100212112220021 has 16 divisors (see below), whose sum is σ = 106168361310720. Its totient is φ = 94458615229440.

The previous prime is 100212112219997. The next prime is 100212112220041. The reversal of 100212112220021 is 120022211212001.

It is a cyclic number.

It is not a de Polignac number, because 100212112220021 - 2³⁴ = 100194932350837 is a prime.

It is a super-2 number, since 2×100212112220021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100212112220041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 270874076 + ... + 271243781.

It is an arithmetic number, because the mean of its divisors is an integer number (6635522581920).

Almost surely, 2^{100212112220021} is an apocalyptic number.

It is an amenable number.

100212112220021 is a deficient number, since it is larger than the sum of its proper divisors (5956249090699).

100212112220021 is an equidigital number, since it uses as much as digits as its factorization.

100212112220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542118044.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 100212112220021 its reverse (120022211212001), we get a palindrome (220234323432022).

The spelling of 100212112220021 in words is "one hundred trillion, two hundred twelve billion, one hundred twelve million, two hundred twenty thousand, twenty-one".