121321924190 has 32 divisors (see below), whose sum is σ = 221494845600. Its totient is φ = 47839025664.

The previous prime is 121321924181. The next prime is 121321924201. The reversal of 121321924190 is 91429123121.

It is a happy number.

It is a super-2 number, since 2×121321924190² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121321924190.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 219386 + ... + 539234.

It is an arithmetic number, because the mean of its divisors is an integer number (6921713925).

Almost surely, 2^121321924190 is an apocalyptic number.

121321924190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121321924190 is a deficient number, since it is larger than the sum of its proper divisors (100172921410).

121321924190 is a wasteful number, since it uses less digits than its factorization.

121321924190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320396.

The product of its (nonzero) digits is 7776, while the sum is 35.

The spelling of 121321924190 in words is "one hundred twenty-one billion, three hundred twenty-one million, nine hundred twenty-four thousand, one hundred ninety".