201121012400405 has 8 divisors (see below), whose sum is σ = 241345549104000. Its totient is φ = 160896587104656.

The previous prime is 201121012400401. The next prime is 201121012400447. The reversal of 201121012400405 is 504004210121102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201121012400405 - 2² = 201121012400401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201121012400401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23827505 + ... + 31144694.

It is an arithmetic number, because the mean of its divisors is an integer number (30168193638000).

Almost surely, 2^{201121012400405} is an apocalyptic number.

It is an amenable number.

201121012400405 is a deficient number, since it is larger than the sum of its proper divisors (40224536703595).

201121012400405 is an equidigital number, since it uses as much as digits as its factorization.

201121012400405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55703923.

The product of its (nonzero) digits is 640, while the sum is 23.

Adding to 201121012400405 its reverse (504004210121102), we get a palindrome (705125222521507).

The spelling of 201121012400405 in words is "two hundred one trillion, one hundred twenty-one billion, twelve million, four hundred thousand, four hundred five".