23321221001 has 4 divisors (see below), whose sum is σ = 25115161092. Its totient is φ = 21527280912.

The previous prime is 23321220983. The next prime is 23321221003. The reversal of 23321221001 is 10012212332.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6056574976 + 17264646025 = 77824^2 + 131395^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23321221001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23321221003) 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, 896970026 + ... + 896970051.

It is an arithmetic number, because the mean of its divisors is an integer number (6278790273).

Almost surely, 2^23321221001 is an apocalyptic number.

It is an amenable number.

23321221001 is a deficient number, since it is larger than the sum of its proper divisors (1793940091).

23321221001 is a wasteful number, since it uses less digits than its factorization.

23321221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1793940090.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 23321221001 its reverse (10012212332), we get a palindrome (33333433333).

The spelling of 23321221001 in words is "twenty-three billion, three hundred twenty-one million, two hundred twenty-one thousand, one".