125551321124 has 6 divisors (see below), whose sum is σ = 219714811974. Its totient is φ = 62775660560.

The previous prime is 125551321069. The next prime is 125551321163. The reversal of 125551321124 is 421123155521.

It can be written as a sum of positive squares in only one way, i.e., 125535576100 + 15745024 = 354310^2 + 3968^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15693915137 + ... + 15693915144.

It is an arithmetic number, because the mean of its divisors is an integer number (36619135329).

Almost surely, 2^125551321124 is an apocalyptic number.

It is an amenable number.

125551321124 is a deficient number, since it is larger than the sum of its proper divisors (94163490850).

125551321124 is a wasteful number, since it uses less digits than its factorization.

125551321124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31387830285 (or 31387830283 counting only the distinct ones).

The product of its digits is 12000, while the sum is 32.

Adding to 125551321124 its reverse (421123155521), we get a palindrome (546674476645).

The spelling of 125551321124 in words is "one hundred twenty-five billion, five hundred fifty-one million, three hundred twenty-one thousand, one hundred twenty-four".