21121222010131 has 2 divisors, whose sum is σ = 21121222010132. Its totient is φ = 21121222010130.

The previous prime is 21121222010113. The next prime is 21121222010219. The reversal of 21121222010131 is 13101022212112.

Together with previous prime (21121222010113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21121222010131 is a prime.

It is a super-2 number, since 2×21121222010131² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21121222010099 and 21121222010108.

It is not a weakly prime, because it can be changed into another prime (21121222010531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560611005065 + 10560611005066.

It is an arithmetic number, because the mean of its divisors is an integer number (10560611005066).

Almost surely, 2^{21121222010131} is an apocalyptic number.

21121222010131 is a deficient number, since it is larger than the sum of its proper divisors (1).

21121222010131 is an equidigital number, since it uses as much as digits as its factorization.

21121222010131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 21121222010131 its reverse (13101022212112), we get a palindrome (34222244222243).

The spelling of 21121222010131 in words is "twenty-one trillion, one hundred twenty-one billion, two hundred twenty-two million, ten thousand, one hundred thirty-one".