21312032212101 has 16 divisors (see below), whose sum is σ = 30253804596288. Its totient is φ = 13298375635200.

The previous prime is 21312032212091. The next prime is 21312032212127. The reversal of 21312032212101 is 10121223021312.

It is not a de Polignac number, because 21312032212101 - 2⁷ = 21312032211973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21312032211101) 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, 1154363655 + ... + 1154382116.

It is an arithmetic number, because the mean of its divisors is an integer number (1890862787268).

Almost surely, 2^{21312032212101} is an apocalyptic number.

It is an amenable number.

21312032212101 is a deficient number, since it is larger than the sum of its proper divisors (8941772384187).

21312032212101 is a wasteful number, since it uses less digits than its factorization.

21312032212101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2308745972.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 21312032212101 its reverse (10121223021312), we get a palindrome (31433255233413).

The spelling of 21312032212101 in words is "twenty-one trillion, three hundred twelve billion, thirty-two million, two hundred twelve thousand, one hundred one".