121011800918 has 16 divisors (see below), whose sum is σ = 187244860464. Its totient is φ = 58611255840.

The previous prime is 121011800891. The next prime is 121011800941. The reversal of 121011800918 is 819008110121.

It is a super-2 number, since 2×121011800918² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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, 3585173 + ... + 3618768.

It is an arithmetic number, because the mean of its divisors is an integer number (11702803779).

Almost surely, 2^121011800918 is an apocalyptic number.

121011800918 is a deficient number, since it is larger than the sum of its proper divisors (66233059546).

121011800918 is a wasteful number, since it uses less digits than its factorization.

121011800918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7204207.

The product of its (nonzero) digits is 1152, while the sum is 32.

The spelling of 121011800918 in words is "one hundred twenty-one billion, eleven million, eight hundred thousand, nine hundred eighteen".