31342220217109 has 2 divisors, whose sum is σ = 31342220217110. Its totient is φ = 31342220217108.

The previous prime is 31342220217083. The next prime is 31342220217131. The reversal of 31342220217109 is 90171202224313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21880924067025 + 9461296150084 = 4677705^2 + 3075922^2 .

It is a cyclic number.

It is not a de Polignac number, because 31342220217109 - 2¹³ = 31342220208917 is a prime.

It is a super-2 number, since 2×31342220217109² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31342220215109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15671110108554 + 15671110108555.

It is an arithmetic number, because the mean of its divisors is an integer number (15671110108555).

Almost surely, 2^{31342220217109} is an apocalyptic number.

It is an amenable number.

31342220217109 is a deficient number, since it is larger than the sum of its proper divisors (1).

31342220217109 is an equidigital number, since it uses as much as digits as its factorization.

31342220217109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 37.

The spelling of 31342220217109 in words is "thirty-one trillion, three hundred forty-two billion, two hundred twenty million, two hundred seventeen thousand, one hundred nine".