100001212200021 has 16 divisors (see below), whose sum is σ = 148839013509120. Its totient is φ = 59197334916720.

The previous prime is 100001212200017. The next prime is 100001212200031. The reversal of 100001212200021 is 120002212100001.

It is not a de Polignac number, because 100001212200021 - 2² = 100001212200017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100001212200031) 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, 35236507461 + ... + 35236510298.

It is an arithmetic number, because the mean of its divisors is an integer number (9302438344320).

Almost surely, 2^{100001212200021} is an apocalyptic number.

100001212200021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

100001212200021 is a deficient number, since it is larger than the sum of its proper divisors (48837801309099).

100001212200021 is a wasteful number, since it uses less digits than its factorization.

100001212200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70473017816.

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

Adding to 100001212200021 its reverse (120002212100001), we get a palindrome (220003424300022).

The spelling of 100001212200021 in words is "one hundred trillion, one billion, two hundred twelve million, two hundred thousand, twenty-one".