121150215045405 has 384 divisors, whose sum is σ = 278705411712000. Its totient is φ = 47231060705280.

The previous prime is 121150215045401. The next prime is 121150215045443. The reversal of 121150215045405 is 504540512051121.

121150215045405 is a `hidden beast` number, since 1 + 2 + 1 + 1 + 50 + 2 + 150 + 454 + 0 + 5 = 666.

121150215045405 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 121150215045405 - 2² = 121150215045401 is a prime.

It is a super-2 number, since 2×121150215045405² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121150215045405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121150215045401) by changing a digit.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 2118982399 + ... + 2119039571.

It is an arithmetic number, because the mean of its divisors is an integer number (725795343000).

Almost surely, 2^{121150215045405} is an apocalyptic number.

121150215045405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121150215045405 is an abundant number, since it is smaller than the sum of its proper divisors (157555196666595).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121150215045405 is a wasteful number, since it uses less digits than its factorization.

121150215045405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57781 (or 57778 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 36.

Adding to 121150215045405 its reverse (504540512051121), we get a palindrome (625690727096526).

The spelling of 121150215045405 in words is "one hundred twenty-one trillion, one hundred fifty billion, two hundred fifteen million, forty-five thousand, four hundred five".