121023103143405 has 16 divisors (see below), whose sum is σ = 193669768316160. Its totient is φ = 64534720580928.

The previous prime is 121023103143347. The next prime is 121023103143421. The reversal of 121023103143405 is 504341301320121.

121023103143405 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 121023103143405 - 2²⁶ = 121023036034541 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 683310310 + ... + 683487399.

It is an arithmetic number, because the mean of its divisors is an integer number (12104360519760).

Almost surely, 2^{121023103143405} is an apocalyptic number.

121023103143405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121023103143405 is a deficient number, since it is larger than the sum of its proper divisors (72646665172755).

121023103143405 is a wasteful number, since it uses less digits than its factorization.

121023103143405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366803620.

The product of its (nonzero) digits is 8640, while the sum is 30.

Adding to 121023103143405 its reverse (504341301320121), we get a palindrome (625364404463526).

The spelling of 121023103143405 in words is "one hundred twenty-one trillion, twenty-three billion, one hundred three million, one hundred forty-three thousand, four hundred five".