21102343120131 has 64 divisors (see below), whose sum is σ = 34692226394112. Its totient is φ = 11110749484032.

The previous prime is 21102343120121. The next prime is 21102343120169. The reversal of 21102343120131 is 13102134320112.

It is not a de Polignac number, because 21102343120131 - 2¹⁰ = 21102343119107 is a prime.

It is a super-2 number, since 2×21102343120131² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21102343120121) 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 63 ways as a sum of consecutive naturals, for example, 726075106 + ... + 726104168.

It is an arithmetic number, because the mean of its divisors is an integer number (542066037408).

Almost surely, 2^{21102343120131} is an apocalyptic number.

21102343120131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21102343120131 is a deficient number, since it is larger than the sum of its proper divisors (13589883273981).

21102343120131 is a wasteful number, since it uses less digits than its factorization.

21102343120131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33812.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 21102343120131 its reverse (13102134320112), we get a palindrome (34204477440243).

The spelling of 21102343120131 in words is "twenty-one trillion, one hundred two billion, three hundred forty-three million, one hundred twenty thousand, one hundred thirty-one".