2031111309989 has 2 divisors, whose sum is σ = 2031111309990. Its totient is φ = 2031111309988.

The previous prime is 2031111309967. The next prime is 2031111310021. The reversal of 2031111309989 is 9899031111302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1830021845089 + 201089464900 = 1352783^2 + 448430^2 .

It is a cyclic number.

It is not a de Polignac number, because 2031111309989 - 2²⁴ = 2031094532773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2031111302989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1015555654994 + 1015555654995.

It is an arithmetic number, because the mean of its divisors is an integer number (1015555654995).

Almost surely, 2^{2031111309989} is an apocalyptic number.

It is an amenable number.

2031111309989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2031111309989 is an equidigital number, since it uses as much as digits as its factorization.

2031111309989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 104976, while the sum is 47.

The spelling of 2031111309989 in words is "two trillion, thirty-one billion, one hundred eleven million, three hundred nine thousand, nine hundred eighty-nine".