121534502112 has 72 divisors (see below), whose sum is σ = 358414272216. Its totient is φ = 40511498112.

The previous prime is 121534502077. The next prime is 121534502119. The reversal of 121534502112 is 211205435121.

It is a happy number.

121534502112 is a `hidden beast` number, since 1 + 2 + 15 + 34 + 502 + 112 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×121534502112² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121534502119) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7806943 + ... + 7822494.

It is an arithmetic number, because the mean of its divisors is an integer number (4977976003).

Almost surely, 2^121534502112 is an apocalyptic number.

121534502112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121534502112 is an abundant number, since it is smaller than the sum of its proper divisors (236879770104).

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

121534502112 is an equidigital number, since it uses as much as digits as its factorization.

121534502112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15629462 (or 15629442 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

Adding to 121534502112 its reverse (211205435121), we get a palindrome (332739937233).

The spelling of 121534502112 in words is "one hundred twenty-one billion, five hundred thirty-four million, five hundred two thousand, one hundred twelve".