11101211991937 has 2 divisors, whose sum is σ = 11101211991938. Its totient is φ = 11101211991936.

The previous prime is 11101211991929. The next prime is 11101211991953. The reversal of 11101211991937 is 73919911210111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6601400123761 + 4499811868176 = 2569319^2 + 2121276^2 .

It is a cyclic number.

It is not a de Polignac number, because 11101211991937 - 2³ = 11101211991929 is a prime.

It is not a weakly prime, because it can be changed into another prime (11101211991907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5550605995968 + 5550605995969.

It is an arithmetic number, because the mean of its divisors is an integer number (5550605995969).

Almost surely, 2^{11101211991937} is an apocalyptic number.

It is an amenable number.

11101211991937 is a deficient number, since it is larger than the sum of its proper divisors (1).

11101211991937 is an equidigital number, since it uses as much as digits as its factorization.

11101211991937 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30618, while the sum is 46.

The spelling of 11101211991937 in words is "eleven trillion, one hundred one billion, two hundred eleven million, nine hundred ninety-one thousand, nine hundred thirty-seven".