100021332020 has 24 divisors (see below), whose sum is σ = 210059335584. Its totient is φ = 40005763616.

The previous prime is 100021332017. The next prime is 100021332023. The reversal of 100021332020 is 20233120001.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (100021332017) and next prime (100021332023).

It is a junction number, because it is equal to n+sod(n) for n = 100021331986 and 100021332004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100021332023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136619 + ... + 467661.

It is an arithmetic number, because the mean of its divisors is an integer number (8752472316).

Almost surely, 2^100021332020 is an apocalyptic number.

100021332020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100021332020 is an abundant number, since it is smaller than the sum of its proper divisors (110038003564).

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

100021332020 is a wasteful number, since it uses less digits than its factorization.

100021332020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346159 (or 346157 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 100021332020 its reverse (20233120001), we get a palindrome (120254452021).

The spelling of 100021332020 in words is "one hundred billion, twenty-one million, three hundred thirty-two thousand, twenty".