1210011111979 has 2 divisors, whose sum is σ = 1210011111980. Its totient is φ = 1210011111978.

The previous prime is 1210011111949. The next prime is 1210011112021. The reversal of 1210011111979 is 9791111100121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1210011111979 - 2⁹ = 1210011111467 is a prime.

It is a super-2 number, since 2×1210011111979² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1210011111949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605005555989 + 605005555990.

It is an arithmetic number, because the mean of its divisors is an integer number (605005555990).

Almost surely, 2^{1210011111979} is an apocalyptic number.

1210011111979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210011111979 is an equidigital number, since it uses as much as digits as its factorization.

1210011111979 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 34.

The spelling of 1210011111979 in words is "one trillion, two hundred ten billion, eleven million, one hundred eleven thousand, nine hundred seventy-nine".