23112121212220 has 24 divisors (see below), whose sum is σ = 48548117230704. Its totient is φ = 9242436544896.

The previous prime is 23112121212197. The next prime is 23112121212227. The reversal of 23112121212220 is 2221212121132.

It is a junction number, because it is equal to n+sod(n) for n = 23112121212191 and 23112121212200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23112121212227) 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, 150667674 + ... + 150820993.

It is an arithmetic number, because the mean of its divisors is an integer number (2022838217946).

Almost surely, 2^{23112121212220} is an apocalyptic number.

23112121212220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23112121212220 is an abundant number, since it is smaller than the sum of its proper divisors (25435996018484).

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

23112121212220 is a wasteful number, since it uses less digits than its factorization.

23112121212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301492509 (or 301492507 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 23112121212220 its reverse (2221212121132), we get a palindrome (25333333333352).

The spelling of 23112121212220 in words is "twenty-three trillion, one hundred twelve billion, one hundred twenty-one million, two hundred twelve thousand, two hundred twenty".