2131333020209 has 2 divisors, whose sum is σ = 2131333020210. Its totient is φ = 2131333020208.

The previous prime is 2131333020203. The next prime is 2131333020293. The reversal of 2131333020209 is 9020203331312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1662694197025 + 468638823184 = 1289455^2 + 684572^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2131333020209 is a prime.

It is not a weakly prime, because it can be changed into another prime (2131333020203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065666510104 + 1065666510105.

It is an arithmetic number, because the mean of its divisors is an integer number (1065666510105).

Almost surely, 2^{2131333020209} is an apocalyptic number.

It is an amenable number.

2131333020209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131333020209 is an equidigital number, since it uses as much as digits as its factorization.

2131333020209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 29.

The spelling of 2131333020209 in words is "two trillion, one hundred thirty-one billion, three hundred thirty-three million, twenty thousand, two hundred nine".