121121112190 has 16 divisors (see below), whose sum is σ = 234788617728. Its totient is φ = 44721641376.

The previous prime is 121121112187. The next prime is 121121112191. The reversal of 121121112190 is 91211121121.

It is a happy number.

It is a super-2 number, since 2×121121112190² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121121112191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 465850302 + ... + 465850561.

It is an arithmetic number, because the mean of its divisors is an integer number (14674288608).

Almost surely, 2^121121112190 is an apocalyptic number.

121121112190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121121112190 is a deficient number, since it is larger than the sum of its proper divisors (113667505538).

121121112190 is a wasteful number, since it uses less digits than its factorization.

121121112190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931700883.

The product of its (nonzero) digits is 72, while the sum is 22.

The spelling of 121121112190 in words is "one hundred twenty-one billion, one hundred twenty-one million, one hundred twelve thousand, one hundred ninety".