121695636 has 24 divisors (see below), whose sum is σ = 284183200. Its totient is φ = 40532832.

The previous prime is 121695631. The next prime is 121695649. The reversal of 121695636 is 636596121.

It is a junction number, because it is equal to n+sod(n) for n = 121695594 and 121695603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121695631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15315 + ... + 21861.

Almost surely, 2^121695636 is an apocalyptic number.

It is an amenable number.

121695636 is an abundant number, since it is smaller than the sum of its proper divisors (162487564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121695636 is a wasteful number, since it uses less digits than its factorization.

121695636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8103 (or 8101 counting only the distinct ones).

The product of its digits is 58320, while the sum is 39.

The square root of 121695636 is about 11031.5745023093. The cubic root of 121695636 is about 495.5547784610.

The spelling of 121695636 in words is "one hundred twenty-one million, six hundred ninety-five thousand, six hundred thirty-six".