100202101020 has 72 divisors (see below), whose sum is σ = 347367287904. Its totient is φ = 22903337088.

The previous prime is 100202101019. The next prime is 100202101037. The reversal of 100202101020 is 20101202001.

It is a super-2 number, since 2×100202101020² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 100202100993 and 100202101011.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39761479 + ... + 39763998.

Almost surely, 2^100202101020 is an apocalyptic number.

100202101020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100202101020 is an abundant number, since it is smaller than the sum of its proper divisors (247165186884).

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

100202101020 is a wasteful number, since it uses less digits than its factorization.

100202101020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79525499 (or 79525494 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 100202101020 its reverse (20101202001), we get a palindrome (120303303021).

The spelling of 100202101020 in words is "one hundred billion, two hundred two million, one hundred one thousand, twenty".