11121321979 has 2 divisors, whose sum is σ = 11121321980. Its totient is φ = 11121321978.

The previous prime is 11121321949. The next prime is 11121322007. The reversal of 11121321979 is 97912312111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11121321979 - 2²⁹ = 10584451067 is a prime.

It is not a weakly prime, because it can be changed into another prime (11121321949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5560660989 + 5560660990.

It is an arithmetic number, because the mean of its divisors is an integer number (5560660990).

Almost surely, 2^11121321979 is an apocalyptic number.

11121321979 is a deficient number, since it is larger than the sum of its proper divisors (1).

11121321979 is an equidigital number, since it uses as much as digits as its factorization.

11121321979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804, while the sum is 37.

It can be divided in two parts, 1112132 and 1979, that added together give a palindrome (1114111).

The spelling of 11121321979 in words is "eleven billion, one hundred twenty-one million, three hundred twenty-one thousand, nine hundred seventy-nine".