100020120200021 has 16 divisors (see below), whose sum is σ = 116462777485824. Its totient is φ = 84127902977664.

The previous prime is 100020120199973. The next prime is 100020120200051. The reversal of 100020120200021 is 120002021020001.

It is a happy number.

It is not a de Polignac number, because 100020120200021 - 2²⁶ = 100020053091157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100020120199975 and 100020120200011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100020120200051) 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, 496686365 + ... + 496887698.

It is an arithmetic number, because the mean of its divisors is an integer number (7278923592864).

Almost surely, 2^{100020120200021} is an apocalyptic number.

It is an amenable number.

100020120200021 is a deficient number, since it is larger than the sum of its proper divisors (16442657285803).

100020120200021 is an equidigital number, since it uses as much as digits as its factorization.

100020120200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993574340.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 100020120200021 its reverse (120002021020001), we get a palindrome (220022141220022).

The spelling of 100020120200021 in words is "one hundred trillion, twenty billion, one hundred twenty million, two hundred thousand, twenty-one".