23101231011221 has 4 divisors (see below), whose sum is σ = 25201342921344. Its totient is φ = 21001119101100.

The previous prime is 23101231011203. The next prime is 23101231011241. The reversal of 23101231011221 is 12211013210132.

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 a cyclic number.

It is not a de Polignac number, because 23101231011221 - 2¹⁴ = 23101230994837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23101231011193 and 23101231011202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23101231011241) 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, 1050055955045 + ... + 1050055955066.

It is an arithmetic number, because the mean of its divisors is an integer number (6300335730336).

Almost surely, 2^{23101231011221} is an apocalyptic number.

It is an amenable number.

23101231011221 is a deficient number, since it is larger than the sum of its proper divisors (2100111910123).

23101231011221 is a wasteful number, since it uses less digits than its factorization.

23101231011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2100111910122.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 23101231011221 its reverse (12211013210132), we get a palindrome (35312244221353).

Subtracting from 23101231011221 its reverse (12211013210132), we obtain a square (10890217801089 = 3300033²).

The spelling of 23101231011221 in words is "twenty-three trillion, one hundred one billion, two hundred thirty-one million, eleven thousand, two hundred twenty-one".