100020001222021 has 16 divisors (see below), whose sum is σ = 103581211345920. Its totient is φ = 96514982146800.

The previous prime is 100020001221859. The next prime is 100020001222111. The reversal of 100020001222021 is 120222100020001.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 100020001222021 - 2¹⁷ = 100020001090949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100020001221992 and 100020001222010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100020001222721) 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, 196965796 + ... + 197472946.

It is an arithmetic number, because the mean of its divisors is an integer number (6473825709120).

Almost surely, 2^{100020001222021} is an apocalyptic number.

It is an amenable number.

100020001222021 is a deficient number, since it is larger than the sum of its proper divisors (3561210123899).

100020001222021 is an equidigital number, since it uses as much as digits as its factorization.

100020001222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562536.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 100020001222021 its reverse (120222100020001), we get a palindrome (220242101242022).

The spelling of 100020001222021 in words is "one hundred trillion, twenty billion, one million, two hundred twenty-two thousand, twenty-one".