12251551421264 has 20 divisors (see below), whose sum is σ = 24986716715040. Its totient is φ = 5803366462560.

The previous prime is 12251551421261. The next prime is 12251551421267. The reversal of 12251551421264 is 46212415515221.

It is an interprime number because it is at equal distance from previous prime (12251551421261) and next prime (12251551421267).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12251551421261) 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, 20150577692 + ... + 20150578299.

It is an arithmetic number, because the mean of its divisors is an integer number (1249335835752).

Almost surely, 2^{12251551421264} is an apocalyptic number.

It is an amenable number.

12251551421264 is an abundant number, since it is smaller than the sum of its proper divisors (12735165293776).

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

12251551421264 is a wasteful number, since it uses less digits than its factorization.

12251551421264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40301156018 (or 40301156012 counting only the distinct ones).

The product of its digits is 192000, while the sum is 41.

Adding to 12251551421264 its reverse (46212415515221), we get a palindrome (58463966936485).

The spelling of 12251551421264 in words is "twelve trillion, two hundred fifty-one billion, five hundred fifty-one million, four hundred twenty-one thousand, two hundred sixty-four".