23321123220021 has 16 divisors (see below), whose sum is σ = 34109046124608. Its totient is φ = 14055925593600.

The previous prime is 23321123219993. The next prime is 23321123220037. The reversal of 23321123220021 is 12002232112332.

It is not a de Polignac number, because 23321123220021 - 2¹⁸ = 23321122957877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23321123219973 and 23321123220000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23321123228021) 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, 1952205916 + ... + 1952217861.

It is an arithmetic number, because the mean of its divisors is an integer number (2131815382788).

Almost surely, 2^{23321123220021} is an apocalyptic number.

It is an amenable number.

23321123220021 is a deficient number, since it is larger than the sum of its proper divisors (10787922904587).

23321123220021 is a wasteful number, since it uses less digits than its factorization.

23321123220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3904423972.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 23321123220021 its reverse (12002232112332), we get a palindrome (35323355332353).

The spelling of 23321123220021 in words is "twenty-three trillion, three hundred twenty-one billion, one hundred twenty-three million, two hundred twenty thousand, twenty-one".