121636910690 has 64 divisors (see below), whose sum is σ = 223031975040. Its totient is φ = 47756666880.

The previous prime is 121636910683. The next prime is 121636910713. The reversal of 121636910690 is 96019636121.

It is a super-2 number, since 2×121636910690² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103873805 + ... + 103874975.

It is an arithmetic number, because the mean of its divisors is an integer number (3484874610).

Almost surely, 2^121636910690 is an apocalyptic number.

121636910690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121636910690 is a deficient number, since it is larger than the sum of its proper divisors (101395064350).

121636910690 is a wasteful number, since it uses less digits than its factorization.

121636910690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2067.

The product of its (nonzero) digits is 104976, while the sum is 44.

The spelling of 121636910690 in words is "one hundred twenty-one billion, six hundred thirty-six million, nine hundred ten thousand, six hundred ninety".