11555430421131 has 24 divisors (see below), whose sum is σ = 17838179586864. Its totient is φ = 7182704770560.

The previous prime is 11555430421069. The next prime is 11555430421193. The reversal of 11555430421131 is 13112403455511.

11555430421131 is a `hidden beast` number, since 1 + 1 + 5 + 5 + 5 + 430 + 4 + 211 + 3 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (11555430421069) and next prime (11555430421193).

It is not a de Polignac number, because 11555430421131 - 2¹⁷ = 11555430290059 is a prime.

It is a super-2 number, since 2×11555430421131² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11555430421231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 352907410 + ... + 352940151.

It is an arithmetic number, because the mean of its divisors is an integer number (743257482786).

Almost surely, 2^{11555430421131} is an apocalyptic number.

11555430421131 is a deficient number, since it is larger than the sum of its proper divisors (6282749165733).

11555430421131 is a wasteful number, since it uses less digits than its factorization.

11555430421131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705847691 (or 705847688 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

Adding to 11555430421131 its reverse (13112403455511), we get a palindrome (24667833876642).

The spelling of 11555430421131 in words is "eleven trillion, five hundred fifty-five billion, four hundred thirty million, four hundred twenty-one thousand, one hundred thirty-one".