31211198434061 has 2 divisors, whose sum is σ = 31211198434062. Its totient is φ = 31211198434060.

The previous prime is 31211198434057. The next prime is 31211198434067. The reversal of 31211198434061 is 16043489111213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30945077608900 + 266120825161 = 5562830^2 + 515869^2 .

It is a cyclic number.

It is not a de Polignac number, because 31211198434061 - 2² = 31211198434057 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31211198434067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15605599217030 + 15605599217031.

It is an arithmetic number, because the mean of its divisors is an integer number (15605599217031).

Almost surely, 2^{31211198434061} is an apocalyptic number.

It is an amenable number.

31211198434061 is a deficient number, since it is larger than the sum of its proper divisors (1).

31211198434061 is an equidigital number, since it uses as much as digits as its factorization.

31211198434061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 44.

The spelling of 31211198434061 in words is "thirty-one trillion, two hundred eleven billion, one hundred ninety-eight million, four hundred thirty-four thousand, sixty-one".