21231233100101 has 12 divisors (see below), whose sum is σ = 22118447431812. Its totient is φ = 20373834144000.

The previous prime is 21231233100067. The next prime is 21231233100113. The reversal of 21231233100101 is 10100133213212.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 17013364575076 + 4217868525025 = 4124726^2 + 2053745^2 .

It is not a de Polignac number, because 21231233100101 - 2⁴² = 16833186588997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21231233100191) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 103423040 + ... + 103628121.

It is an arithmetic number, because the mean of its divisors is an integer number (1843203952651).

Almost surely, 2^{21231233100101} is an apocalyptic number.

It is an amenable number.

21231233100101 is a deficient number, since it is larger than the sum of its proper divisors (887214331711).

21231233100101 is an equidigital number, since it uses as much as digits as its factorization.

21231233100101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207051304 (or 207051263 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 21231233100101 its reverse (10100133213212), we get a palindrome (31331366313313).

It can be divided in two parts, 21231 and 233100101, that added together give a palindrome (233121332).

The spelling of 21231233100101 in words is "twenty-one trillion, two hundred thirty-one billion, two hundred thirty-three million, one hundred thousand, one hundred one".