21241211112131 has 2 divisors, whose sum is σ = 21241211112132. Its totient is φ = 21241211112130.

The previous prime is 21241211112113. The next prime is 21241211112227. The reversal of 21241211112131 is 13121111214212.

It is a happy number.

Together with previous prime (21241211112113) 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 not a de Polignac number, because 21241211112131 - 2³⁰ = 21240137370307 is a prime.

It is a super-2 number, since 2×21241211112131² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21241211112097 and 21241211112106.

It is not a weakly prime, because it can be changed into another prime (21241211112031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10620605556065 + 10620605556066.

It is an arithmetic number, because the mean of its divisors is an integer number (10620605556066).

Almost surely, 2^{21241211112131} is an apocalyptic number.

21241211112131 is a deficient number, since it is larger than the sum of its proper divisors (1).

21241211112131 is an equidigital number, since it uses as much as digits as its factorization.

21241211112131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192, while the sum is 23.

Adding to 21241211112131 its reverse (13121111214212), we get a palindrome (34362322326343).

The spelling of 21241211112131 in words is "twenty-one trillion, two hundred forty-one billion, two hundred eleven million, one hundred twelve thousand, one hundred thirty-one".