21231123130101 has 4 divisors (see below), whose sum is σ = 28308164173472. Its totient is φ = 14154082086732.

The previous prime is 21231123130099. The next prime is 21231123130103. The reversal of 21231123130101 is 10103132113212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (21231123130099) and next prime (21231123130103).

It is not a de Polignac number, because 21231123130101 - 2¹ = 21231123130099 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 (21231123130103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3538520521681 + ... + 3538520521686.

It is an arithmetic number, because the mean of its divisors is an integer number (7077041043368).

Almost surely, 2^{21231123130101} is an apocalyptic number.

It is an amenable number.

21231123130101 is a deficient number, since it is larger than the sum of its proper divisors (7077041043371).

21231123130101 is an equidigital number, since it uses as much as digits as its factorization.

21231123130101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7077041043370.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 21231123130101 its reverse (10103132113212), we get a palindrome (31334255243313).

The spelling of 21231123130101 in words is "twenty-one trillion, two hundred thirty-one billion, one hundred twenty-three million, one hundred thirty thousand, one hundred one".