121105555050 has 24 divisors (see below), whose sum is σ = 300341776896. Its totient is φ = 32294814640.

The previous prime is 121105555027. The next prime is 121105555099. The reversal of 121105555050 is 50555501121.

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

It is a junction number, because it is equal to n+sod(n) for n = 121105554999 and 121105555017.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 403685034 + ... + 403685333.

It is an arithmetic number, because the mean of its divisors is an integer number (12514240704).

Almost surely, 2^121105555050 is an apocalyptic number.

121105555050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121105555050 is an abundant number, since it is smaller than the sum of its proper divisors (179236221846).

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

121105555050 is a wasteful number, since it uses less digits than its factorization.

121105555050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807370382 (or 807370377 counting only the distinct ones).

The product of its (nonzero) digits is 6250, while the sum is 30.

The spelling of 121105555050 in words is "one hundred twenty-one billion, one hundred five million, five hundred fifty-five thousand, fifty".