11111021231239 has 2 divisors, whose sum is σ = 11111021231240. Its totient is φ = 11111021231238.

The previous prime is 11111021231203. The next prime is 11111021231269. The reversal of 11111021231239 is 93213212011111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11111021231239 - 2³³ = 11102431296647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11111021231269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555510615619 + 5555510615620.

It is an arithmetic number, because the mean of its divisors is an integer number (5555510615620).

Almost surely, 2^{11111021231239} is an apocalyptic number.

11111021231239 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111021231239 is an equidigital number, since it uses as much as digits as its factorization.

11111021231239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 28.

The spelling of 11111021231239 in words is "eleven trillion, one hundred eleven billion, twenty-one million, two hundred thirty-one thousand, two hundred thirty-nine".