11211911539 has 2 divisors, whose sum is σ = 11211911540. Its totient is φ = 11211911538.

The previous prime is 11211911509. The next prime is 11211911561. The reversal of 11211911539 is 93511911211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11211911539 - 2⁹ = 11211911027 is a prime.

It is a super-2 number, since 2×11211911539² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11211911509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605955769 + 5605955770.

It is an arithmetic number, because the mean of its divisors is an integer number (5605955770).

Almost surely, 2^11211911539 is an apocalyptic number.

11211911539 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211911539 is an equidigital number, since it uses as much as digits as its factorization.

11211911539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2430, while the sum is 34.

The spelling of 11211911539 in words is "eleven billion, two hundred eleven million, nine hundred eleven thousand, five hundred thirty-nine".