23211210021 has 8 divisors (see below), whose sum is σ = 31384171584. Its totient is φ = 15256194240.

The previous prime is 23211209999. The next prime is 23211210023. The reversal of 23211210021 is 12001211232.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23211210021 - 2⁷ = 23211209893 is a prime.

It is a super-3 number, since 3×23211210021³ (a number of 32 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23211210023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54486196 + ... + 54486621.

It is an arithmetic number, because the mean of its divisors is an integer number (3923021448).

Almost surely, 2^23211210021 is an apocalyptic number.

It is an amenable number.

23211210021 is a deficient number, since it is larger than the sum of its proper divisors (8172961563).

23211210021 is a wasteful number, since it uses less digits than its factorization.

23211210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108972891.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 23211210021 its reverse (12001211232), we get a palindrome (35212421253).

The spelling of 23211210021 in words is "twenty-three billion, two hundred eleven million, two hundred ten thousand, twenty-one".