31345111201 has 2 divisors, whose sum is σ = 31345111202. Its totient is φ = 31345111200.

The previous prime is 31345111199. The next prime is 31345111277. The reversal of 31345111201 is 10211154313.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27464444176 + 3880667025 = 165724^2 + 62295^2 .

It is a cyclic number.

It is not a de Polignac number, because 31345111201 - 2¹ = 31345111199 is a prime.

Together with 31345111199, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (31345111001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15672555600 + 15672555601.

It is an arithmetic number, because the mean of its divisors is an integer number (15672555601).

Almost surely, 2^31345111201 is an apocalyptic number.

It is an amenable number.

31345111201 is a deficient number, since it is larger than the sum of its proper divisors (1).

31345111201 is an equidigital number, since it uses as much as digits as its factorization.

31345111201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 22.

Adding to 31345111201 its reverse (10211154313), we get a palindrome (41556265514).

The spelling of 31345111201 in words is "thirty-one billion, three hundred forty-five million, one hundred eleven thousand, two hundred one".