100202021020 has 48 divisors (see below), whose sum is σ = 221702775840. Its totient is φ = 37936394496.

The previous prime is 100202020969. The next prime is 100202021057. The reversal of 100202021020 is 20120202001.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 100202020988 and 100202021006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 294714 + ... + 535966.

It is an arithmetic number, because the mean of its divisors is an integer number (4618807830).

Almost surely, 2^100202021020 is an apocalyptic number.

100202021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100202021020 is an abundant number, since it is smaller than the sum of its proper divisors (121500754820).

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

100202021020 is a wasteful number, since it uses less digits than its factorization.

100202021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242374 (or 242372 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 100202021020 its reverse (20120202001), we get a palindrome (120322223021).

The spelling of 100202021020 in words is "one hundred billion, two hundred two million, twenty-one thousand, twenty".