121542261600 has 144 divisors (see below), whose sum is σ = 418891970448. Its totient is φ = 30504714240.

The previous prime is 121542261479. The next prime is 121542261613. The reversal of 121542261600 is 6162245121.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1448689 + ... + 1530288.

It is an arithmetic number, because the mean of its divisors is an integer number (2908972017).

Almost surely, 2^121542261600 is an apocalyptic number.

121542261600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121542261600 is an abundant number, since it is smaller than the sum of its proper divisors (297349708848).

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

121542261600 is a wasteful number, since it uses less digits than its factorization.

121542261600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2979017 (or 2979004 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The spelling of 121542261600 in words is "one hundred twenty-one billion, five hundred forty-two million, two hundred sixty-one thousand, six hundred".