23121406450 has 48 divisors (see below), whose sum is σ = 43861708296. Its totient is φ = 9065548800.

The previous prime is 23121406423. The next prime is 23121406481. The reversal of 23121406450 is 5460412132.

It can be written as a sum of positive squares in 12 ways, for example, as 1048658689 + 22072747761 = 32383^2 + 148569^2 .

It is a super-2 number, since 2×23121406450² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 880714 + ... + 906586.

Almost surely, 2^23121406450 is an apocalyptic number.

23121406450 is a deficient number, since it is larger than the sum of its proper divisors (20740301846).

23121406450 is a wasteful number, since it uses less digits than its factorization.

23121406450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26239 (or 26234 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 23121406450 its reverse (5460412132), we get a palindrome (28581818582).

The spelling of 23121406450 in words is "twenty-three billion, one hundred twenty-one million, four hundred six thousand, four hundred fifty".