2120105556631 has 2 divisors, whose sum is σ = 2120105556632. Its totient is φ = 2120105556630.

The previous prime is 2120105556619. The next prime is 2120105556683. The reversal of 2120105556631 is 1366555010212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2120105556631 - 2⁹ = 2120105556119 is a prime.

It is a super-2 number, since 2×2120105556631² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2120105556431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060052778315 + 1060052778316.

It is an arithmetic number, because the mean of its divisors is an integer number (1060052778316).

Almost surely, 2^{2120105556631} is an apocalyptic number.

2120105556631 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120105556631 is an equidigital number, since it uses as much as digits as its factorization.

2120105556631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54000, while the sum is 37.

The spelling of 2120105556631 in words is "two trillion, one hundred twenty billion, one hundred five million, five hundred fifty-six thousand, six hundred thirty-one".