11212321131 has 24 divisors (see below), whose sum is σ = 18258208080. Its totient is φ = 6795344160.

The previous prime is 11212321091. The next prime is 11212321147. The reversal of 11212321131 is 13112321211.

11212321131 is a `hidden beast` number, since 1 + 1 + 212 + 321 + 131 = 666.

It is not a de Polignac number, because 11212321131 - 2⁶ = 11212321067 is a prime.

It is a super-2 number, since 2×11212321131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11212321171) 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, 1712730 + ... + 1719263.

It is an arithmetic number, because the mean of its divisors is an integer number (760758670).

Almost surely, 2^11212321131 is an apocalyptic number.

11212321131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11212321131 is a deficient number, since it is larger than the sum of its proper divisors (7045886949).

11212321131 is a wasteful number, since it uses less digits than its factorization.

11212321131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3432024 (or 3432007 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

Adding to 11212321131 its reverse (13112321211), we get a palindrome (24324642342).

The spelling of 11212321131 in words is "eleven billion, two hundred twelve million, three hundred twenty-one thousand, one hundred thirty-one".