1100021011979 has 2 divisors, whose sum is σ = 1100021011980. Its totient is φ = 1100021011978.

The previous prime is 1100021011913. The next prime is 1100021011997. The reversal of 1100021011979 is 9791101200011.

Together with next prime (1100021011997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (9791101200011) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1100021011979 is a prime.

It is a super-2 number, since 2×1100021011979² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1100021011909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550010505989 + 550010505990.

It is an arithmetic number, because the mean of its divisors is an integer number (550010505990).

Almost surely, 2^{1100021011979} is an apocalyptic number.

1100021011979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100021011979 is an equidigital number, since it uses as much as digits as its factorization.

1100021011979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134, while the sum is 32.

The spelling of 1100021011979 in words is "one trillion, one hundred billion, twenty-one million, eleven thousand, nine hundred seventy-nine".