100021211200020 has 96 divisors (see below), whose sum is σ = 305694824512896. Its totient is φ = 24233638694400.

The previous prime is 100021211200019. The next prime is 100021211200037. The reversal of 100021211200020 is 20002112120001.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 100021211199969 and 100021211200005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42373999 + ... + 44672118.

It is an arithmetic number, because the mean of its divisors is an integer number (3184321088676).

Almost surely, 2^{100021211200020} is an apocalyptic number.

100021211200020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100021211200020 is an abundant number, since it is smaller than the sum of its proper divisors (205673613312876).

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

100021211200020 is a wasteful number, since it uses less digits than its factorization.

100021211200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87047881 (or 87047879 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 100021211200020 its reverse (20002112120001), we get a palindrome (120023323320021).

The spelling of 100021211200020 in words is "one hundred trillion, twenty-one billion, two hundred eleven million, two hundred thousand, twenty".