121294900636 has 96 divisors (see below), whose sum is σ = 273375406080. Its totient is φ = 45769515264.

The previous prime is 121294900633. The next prime is 121294900667. The reversal of 121294900636 is 636009492121.

It is a super-2 number, since 2×121294900636² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121294900592 and 121294900601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121294900633) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2985370 + ... + 3025726.

It is an arithmetic number, because the mean of its divisors is an integer number (2847660480).

Almost surely, 2^121294900636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121294900636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136687703040).

121294900636 is an abundant number, since it is smaller than the sum of its proper divisors (152080505444).

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

121294900636 is a wasteful number, since it uses less digits than its factorization.

121294900636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40763 (or 40761 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 43.

The spelling of 121294900636 in words is "one hundred twenty-one billion, two hundred ninety-four million, nine hundred thousand, six hundred thirty-six".