121755675500 has 24 divisors (see below), whose sum is σ = 265914396384. Its totient is φ = 48702270000.

The previous prime is 121755675497. The next prime is 121755675553. The reversal of 121755675500 is 5576557121.

It is a super-2 number, since 2×121755675500² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

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, 121755176 + ... + 121756175.

It is an arithmetic number, because the mean of its divisors is an integer number (11079766516).

Almost surely, 2^121755675500 is an apocalyptic number.

121755675500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121755675500 is an abundant number, since it is smaller than the sum of its proper divisors (144158720884).

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

121755675500 is a wasteful number, since it uses less digits than its factorization.

121755675500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243511370 (or 243511358 counting only the distinct ones).

The product of its (nonzero) digits is 367500, while the sum is 44.

The spelling of 121755675500 in words is "one hundred twenty-one billion, seven hundred fifty-five million, six hundred seventy-five thousand, five hundred".