121034512981 has 4 divisors (see below), whose sum is σ = 121198295200. Its totient is φ = 120870730764.

The previous prime is 121034512933. The next prime is 121034512993. The reversal of 121034512981 is 189215430121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 189215430121 = 434989².

It is a cyclic number.

It is not a de Polignac number, because 121034512981 - 2²⁷ = 120900295253 is a prime.

It is a super-2 number, since 2×121034512981² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121034512981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121034515981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81890001 + ... + 81891478.

It is an arithmetic number, because the mean of its divisors is an integer number (30299573800).

Almost surely, 2^121034512981 is an apocalyptic number.

It is an amenable number.

121034512981 is a deficient number, since it is larger than the sum of its proper divisors (163782219).

121034512981 is an equidigital number, since it uses as much as digits as its factorization.

121034512981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163782218.

The product of its (nonzero) digits is 17280, while the sum is 37.

The spelling of 121034512981 in words is "one hundred twenty-one billion, thirty-four million, five hundred twelve thousand, nine hundred eighty-one".