1213412425551 has 24 divisors (see below), whose sum is σ = 1890822482640. Its totient is φ = 746991588096.

The previous prime is 1213412425543. The next prime is 1213412425567. The reversal of 1213412425551 is 1555242143121.

1213412425551 is a `hidden beast` number, since 1 + 21 + 3 + 41 + 2 + 42 + 5 + 551 = 666.

It is not a de Polignac number, because 1213412425551 - 2³ = 1213412425543 is a prime.

It is a super-2 number, since 2×1213412425551² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213412425571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74810761 + ... + 74826978.

It is an arithmetic number, because the mean of its divisors is an integer number (78784270110).

Almost surely, 2^{1213412425551} is an apocalyptic number.

1213412425551 is a deficient number, since it is larger than the sum of its proper divisors (677410057089).

1213412425551 is a wasteful number, since it uses less digits than its factorization.

1213412425551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149637815 (or 149637812 counting only the distinct ones).

The product of its digits is 48000, while the sum is 36.

Adding to 1213412425551 its reverse (1555242143121), we get a palindrome (2768654568672).

The spelling of 1213412425551 in words is "one trillion, two hundred thirteen billion, four hundred twelve million, four hundred twenty-five thousand, five hundred fifty-one".