23211013400220 has 24 divisors (see below), whose sum is σ = 64990837520784. Its totient is φ = 6189603573376.

The previous prime is 23211013400149. The next prime is 23211013400243. The reversal of 23211013400220 is 2200431011232.

It is a super-2 number, since 2×23211013400220² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193425111609 + ... + 193425111728.

It is an arithmetic number, because the mean of its divisors is an integer number (2707951563366).

Almost surely, 2^{23211013400220} is an apocalyptic number.

23211013400220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23211013400220 is an abundant number, since it is smaller than the sum of its proper divisors (41779824120564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23211013400220 is a wasteful number, since it uses less digits than its factorization.

23211013400220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386850223349 (or 386850223347 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 23211013400220 its reverse (2200431011232), we get a palindrome (25411444411452).

The spelling of 23211013400220 in words is "twenty-three trillion, two hundred eleven billion, thirteen million, four hundred thousand, two hundred twenty".