121154412012 has 24 divisors (see below), whose sum is σ = 282704088576. Its totient is φ = 40383309648.

The previous prime is 121154411977. The next prime is 121154412037. The reversal of 121154412012 is 210214451121.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179793 + ... + 524055.

It is an arithmetic number, because the mean of its divisors is an integer number (11779337024).

Almost surely, 2^121154412012 is an apocalyptic number.

121154412012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121154412012 is an abundant number, since it is smaller than the sum of its proper divisors (161549676564).

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

121154412012 is a wasteful number, since it uses less digits than its factorization.

121154412012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373597 (or 373595 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 24.

Adding to 121154412012 its reverse (210214451121), we get a palindrome (331368863133).

The spelling of 121154412012 in words is "one hundred twenty-one billion, one hundred fifty-four million, four hundred twelve thousand, twelve".