23121030400 has 108 divisors (see below), whose sum is σ = 61630551052. Its totient is φ = 8536965120.

The previous prime is 23121030397. The next prime is 23121030433. The reversal of 23121030400 is 403012132.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1537894656 + 21583135744 = 39216^2 + 146912^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55749 + ... + 222148.

Almost surely, 2^23121030400 is an apocalyptic number.

23121030400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23121030400 is an abundant number, since it is smaller than the sum of its proper divisors (38509520652).

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

23121030400 is a wasteful number, since it uses less digits than its factorization.

23121030400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277936 (or 277917 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 23121030400 its reverse (403012132), we get a palindrome (23524042532).

The spelling of 23121030400 in words is "twenty-three billion, one hundred twenty-one million, thirty thousand, four hundred".