31012233321091 has 16 divisors (see below), whose sum is σ = 34923558297600. Its totient is φ = 27282949531200.

The previous prime is 31012233321089. The next prime is 31012233321107. The reversal of 31012233321091 is 19012333221013.

It is a happy number.

It is not a de Polignac number, because 31012233321091 - 2¹ = 31012233321089 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31012233321791) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16860750 + ... + 18609388.

It is an arithmetic number, because the mean of its divisors is an integer number (2182722393600).

Almost surely, 2^{31012233321091} is an apocalyptic number.

31012233321091 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

31012233321091 is a deficient number, since it is larger than the sum of its proper divisors (3911324976509).

31012233321091 is a wasteful number, since it uses less digits than its factorization.

31012233321091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1800690.

The product of its (nonzero) digits is 5832, while the sum is 31.

The spelling of 31012233321091 in words is "thirty-one trillion, twelve billion, two hundred thirty-three million, three hundred twenty-one thousand, ninety-one".