20021010010100 has 72 divisors (see below), whose sum is σ = 47398643459328. Its totient is φ = 7279836940800.

The previous prime is 20021010010091. The next prime is 20021010010147. The reversal of 20021010010100 is 101001012002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14604317 + ... + 15916283.

Almost surely, 2^{20021010010100} is an apocalyptic number.

20021010010100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021010010100 is an abundant number, since it is smaller than the sum of its proper divisors (27377633449228).

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

20021010010100 is a wasteful number, since it uses less digits than its factorization.

20021010010100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325865 (or 1325858 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 20021010010100 its reverse (101001012002), we get a palindrome (20122011022102).

The spelling of 20021010010100 in words is "twenty trillion, twenty-one billion, ten million, ten thousand, one hundred".