100821801492036 has 81 divisors (see below), whose sum is σ = 268977559787391. Its totient is φ = 31838102152848.

The previous prime is 100821801491947. The next prime is 100821801492073. The reversal of 100821801492036 is 630294108128001.

The square root of 100821801492036 is 10041006.

It is a perfect power (a square), and thus also a powerful number.

100821801492036 is a `hidden beast` number, since 1 + 0 + 0 + 82 + 1 + 80 + 1 + 492 + 0 + 3 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 100821801491982 and 100821801492000.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1144630645 + ... + 1144718723.

Almost surely, 2^{100821801492036} is an apocalyptic number.

100821801492036 is the 10041006-th square number.

It is an amenable number.

100821801492036 is an abundant number, since it is smaller than the sum of its proper divisors (168155758295355).

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

100821801492036 is an frugal number, since it uses more digits than its factorization.

100821801492036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176206 (or 88103 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The spelling of 100821801492036 in words is "one hundred trillion, eight hundred twenty-one billion, eight hundred one million, four hundred ninety-two thousand, thirty-six".