1131220312979 has 2 divisors, whose sum is σ = 1131220312980. Its totient is φ = 1131220312978.

The previous prime is 1131220312931. The next prime is 1131220312991. The reversal of 1131220312979 is 9792130221311.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1131220312979 is a prime.

It is not a weakly prime, because it can be changed into another prime (1131220312919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565610156489 + 565610156490.

It is an arithmetic number, because the mean of its divisors is an integer number (565610156490).

Almost surely, 2^{1131220312979} is an apocalyptic number.

1131220312979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131220312979 is an equidigital number, since it uses as much as digits as its factorization.

1131220312979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 41.

The spelling of 1131220312979 in words is "one trillion, one hundred thirty-one billion, two hundred twenty million, three hundred twelve thousand, nine hundred seventy-nine".