31033220020091 has 2 divisors, whose sum is σ = 31033220020092. Its totient is φ = 31033220020090.

The previous prime is 31033220020073. The next prime is 31033220020123. The reversal of 31033220020091 is 19002002233013.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31033220020091 - 2⁶ = 31033220020027 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31033220020091.

It is not a weakly prime, because it can be changed into another prime (31033220020001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15516610010045 + 15516610010046.

It is an arithmetic number, because the mean of its divisors is an integer number (15516610010046).

Almost surely, 2^{31033220020091} is an apocalyptic number.

31033220020091 is a deficient number, since it is larger than the sum of its proper divisors (1).

31033220020091 is an equidigital number, since it uses as much as digits as its factorization.

31033220020091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 26.

The spelling of 31033220020091 in words is "thirty-one trillion, thirty-three billion, two hundred twenty million, twenty thousand, ninety-one".