23121102020 has 24 divisors (see below), whose sum is σ = 50228602200. Its totient is φ = 8929528832.

The previous prime is 23121101989. The next prime is 23121102029. The reversal of 23121102020 is 2020112132.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9842227264 + 13278874756 = 99208^2 + 115234^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23121101986 and 23121102004.

It is not an unprimeable number, because it can be changed into a prime (23121102029) 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, 19931405 + ... + 19932564.

It is an arithmetic number, because the mean of its divisors is an integer number (2092858425).

Almost surely, 2^23121102020 is an apocalyptic number.

23121102020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23121102020 is an abundant number, since it is smaller than the sum of its proper divisors (27107500180).

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

23121102020 is a wasteful number, since it uses less digits than its factorization.

23121102020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39864007 (or 39864005 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 23121102020 its reverse (2020112132), we get a palindrome (25141214152).

The spelling of 23121102020 in words is "twenty-three billion, one hundred twenty-one million, one hundred two thousand, twenty".