2120118914891 has 2 divisors, whose sum is σ = 2120118914892. Its totient is φ = 2120118914890.

The previous prime is 2120118914869. The next prime is 2120118914983. The reversal of 2120118914891 is 1984198110212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2120118914891 - 2²² = 2120114720587 is a prime.

It is not a weakly prime, because it can be changed into another prime (2120118994891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060059457445 + 1060059457446.

It is an arithmetic number, because the mean of its divisors is an integer number (1060059457446).

Almost surely, 2^{2120118914891} is an apocalyptic number.

2120118914891 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120118914891 is an equidigital number, since it uses as much as digits as its factorization.

2120118914891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 47.

The spelling of 2120118914891 in words is "two trillion, one hundred twenty billion, one hundred eighteen million, nine hundred fourteen thousand, eight hundred ninety-one".