21116499930431 has 2 divisors, whose sum is σ = 21116499930432. Its totient is φ = 21116499930430.

The previous prime is 21116499930419. The next prime is 21116499930443. The reversal of 21116499930431 is 13403999461112.

It is a balanced prime because it is at equal distance from previous prime (21116499930419) and next prime (21116499930443).

It is a cyclic number.

It is not a de Polignac number, because 21116499930431 - 2¹⁴ = 21116499914047 is a prime.

It is a super-2 number, since 2×21116499930431² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21116499930481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10558249965215 + 10558249965216.

It is an arithmetic number, because the mean of its divisors is an integer number (10558249965216).

Almost surely, 2^{21116499930431} is an apocalyptic number.

21116499930431 is a deficient number, since it is larger than the sum of its proper divisors (1).

21116499930431 is an equidigital number, since it uses as much as digits as its factorization.

21116499930431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1259712, while the sum is 53.

The spelling of 21116499930431 in words is "twenty-one trillion, one hundred sixteen billion, four hundred ninety-nine million, nine hundred thirty thousand, four hundred thirty-one".