21302101131 has 32 divisors (see below), whose sum is σ = 29446349568. Its totient is φ = 13687470720.

The previous prime is 21302101127. The next prime is 21302101151. The reversal of 21302101131 is 13110120312.

It is a happy number.

It is not a de Polignac number, because 21302101131 - 2² = 21302101127 is a prime.

It is a super-2 number, since 2×21302101131² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21302101131.

It is not an unprimeable number, because it can be changed into a prime (21302101151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5987005 + ... + 5990561.

It is an arithmetic number, because the mean of its divisors is an integer number (920198424).

Almost surely, 2^21302101131 is an apocalyptic number.

21302101131 is a deficient number, since it is larger than the sum of its proper divisors (8144248437).

21302101131 is a wasteful number, since it uses less digits than its factorization.

21302101131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4091.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21302101131 its reverse (13110120312), we get a palindrome (34412221443).

The spelling of 21302101131 in words is "twenty-one billion, three hundred two million, one hundred one thousand, one hundred thirty-one".