11221121011979 has 2 divisors, whose sum is σ = 11221121011980. Its totient is φ = 11221121011978.

The previous prime is 11221121011883. The next prime is 11221121012009. The reversal of 11221121011979 is 97911012112211.

It is a happy number.

11221121011979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11221121011979 is a prime.

It is a super-2 number, since 2×11221121011979² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11221121011279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610560505989 + 5610560505990.

It is an arithmetic number, because the mean of its divisors is an integer number (5610560505990).

Almost surely, 2^{11221121011979} is an apocalyptic number.

11221121011979 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221121011979 is an equidigital number, since it uses as much as digits as its factorization.

11221121011979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 38.

The spelling of 11221121011979 in words is "eleven trillion, two hundred twenty-one billion, one hundred twenty-one million, eleven thousand, nine hundred seventy-nine".