105631421279 has 2 divisors, whose sum is σ = 105631421280. Its totient is φ = 105631421278.

The previous prime is 105631421263. The next prime is 105631421281. The reversal of 105631421279 is 972124136501.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 105631421279 - 2⁴ = 105631421263 is a prime.

It is a super-2 number, since 2×105631421279² (a number of 23 digits) contains 22 as substring.

Together with 105631421281, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105631421179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52815710639 + 52815710640.

It is an arithmetic number, because the mean of its divisors is an integer number (52815710640).

Almost surely, 2^105631421279 is an apocalyptic number.

105631421279 is a deficient number, since it is larger than the sum of its proper divisors (1).

105631421279 is an equidigital number, since it uses as much as digits as its factorization.

105631421279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 41.

The spelling of 105631421279 in words is "one hundred five billion, six hundred thirty-one million, four hundred twenty-one thousand, two hundred seventy-nine".