23231111121220 has 12 divisors (see below), whose sum is σ = 48785333354604. Its totient is φ = 9292444448480.

The previous prime is 23231111121193. The next prime is 23231111121227. The reversal of 23231111121220 is 2212111113232.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15281406812736 + 7949704308484 = 3909144^2 + 2819522^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23231111121191 and 23231111121200.

It is not an unprimeable number, because it can be changed into a prime (23231111121227) 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, 580777778011 + ... + 580777778050.

It is an arithmetic number, because the mean of its divisors is an integer number (4065444446217).

Almost surely, 2^{23231111121220} is an apocalyptic number.

23231111121220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23231111121220 is an abundant number, since it is smaller than the sum of its proper divisors (25554222233384).

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

23231111121220 is a wasteful number, since it uses less digits than its factorization.

23231111121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1161555556070 (or 1161555556068 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 23231111121220 its reverse (2212111113232), we get a palindrome (25443222234452).

The spelling of 23231111121220 in words is "twenty-three trillion, two hundred thirty-one billion, one hundred eleven million, one hundred twenty-one thousand, two hundred twenty".