121505170190 has 16 divisors (see below), whose sum is σ = 218812850928. Its totient is φ = 48579058176.

The previous prime is 121505170181. The next prime is 121505170207. The reversal of 121505170190 is 91071505121.

It is a happy number.

It is a super-2 number, since 2×121505170190² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

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, 2854052 + ... + 2896311.

It is an arithmetic number, because the mean of its divisors is an integer number (13675803183).

Almost surely, 2^121505170190 is an apocalyptic number.

121505170190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121505170190 is a deficient number, since it is larger than the sum of its proper divisors (97307680738).

121505170190 is a wasteful number, since it uses less digits than its factorization.

121505170190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5752483.

The product of its (nonzero) digits is 3150, while the sum is 32.

The spelling of 121505170190 in words is "one hundred twenty-one billion, five hundred five million, one hundred seventy thousand, one hundred ninety".