2621693121431 has 2 divisors, whose sum is σ = 2621693121432. Its totient is φ = 2621693121430.

The previous prime is 2621693121409. The next prime is 2621693121451. The reversal of 2621693121431 is 1341213961262.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2621693121431 - 2²² = 2621688927127 is a prime.

It is a super-2 number, since 2×2621693121431² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2621693121451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1310846560715 + 1310846560716.

It is an arithmetic number, because the mean of its divisors is an integer number (1310846560716).

Almost surely, 2^{2621693121431} is an apocalyptic number.

2621693121431 is a deficient number, since it is larger than the sum of its proper divisors (1).

2621693121431 is an equidigital number, since it uses as much as digits as its factorization.

2621693121431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 41.

The spelling of 2621693121431 in words is "two trillion, six hundred twenty-one billion, six hundred ninety-three million, one hundred twenty-one thousand, four hundred thirty-one".