121662636 has 24 divisors (see below), whose sum is σ = 284121600. Its totient is φ = 40519632.

The previous prime is 121662601. The next prime is 121662637. The reversal of 121662636 is 636266121.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 121662597 and 121662606.

It is not an unprimeable number, because it can be changed into a prime (121662637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13165 + ... + 20411.

It is an arithmetic number, because the mean of its divisors is an integer number (11838400).

Almost surely, 2^121662636 is an apocalyptic number.

It is an amenable number.

121662636 is an abundant number, since it is smaller than the sum of its proper divisors (162458964).

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

121662636 is a wasteful number, since it uses less digits than its factorization.

121662636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8653 (or 8651 counting only the distinct ones).

The product of its digits is 15552, while the sum is 33.

The square root of 121662636 is about 11030.0786941889. The cubic root of 121662636 is about 495.5099814943.

The spelling of 121662636 in words is "one hundred twenty-one million, six hundred sixty-two thousand, six hundred thirty-six".