31220102000209 has 2 divisors, whose sum is σ = 31220102000210. Its totient is φ = 31220102000208.

The previous prime is 31220102000201. The next prime is 31220102000257. The reversal of 31220102000209 is 90200020102213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28266076062225 + 2954025937984 = 5316585^2 + 1718728^2 .

It is a cyclic number.

It is not a de Polignac number, because 31220102000209 - 2³ = 31220102000201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31220102000209.

It is not a weakly prime, because it can be changed into another prime (31220102000201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15610051000104 + 15610051000105.

It is an arithmetic number, because the mean of its divisors is an integer number (15610051000105).

Almost surely, 2^{31220102000209} is an apocalyptic number.

It is an amenable number.

31220102000209 is a deficient number, since it is larger than the sum of its proper divisors (1).

31220102000209 is an equidigital number, since it uses as much as digits as its factorization.

31220102000209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The spelling of 31220102000209 in words is "thirty-one trillion, two hundred twenty billion, one hundred two million, two hundred nine", and thus it is an aban number.