31231320212122 has 16 divisors (see below), whose sum is σ = 50658061322880. Its totient is φ = 14384387781568.

The previous prime is 31231320212101. The next prime is 31231320212143. The reversal of 31231320212122 is 22121202313213.

It is an interprime number because it is at equal distance from previous prime (31231320212101) and next prime (31231320212143).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9772000972 + ... + 9772004167.

It is an arithmetic number, because the mean of its divisors is an integer number (3166128832680).

Almost surely, 2^{31231320212122} is an apocalyptic number.

31231320212122 is a deficient number, since it is larger than the sum of its proper divisors (19426741110758).

31231320212122 is a wasteful number, since it uses less digits than its factorization.

31231320212122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19544005205.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 31231320212122 its reverse (22121202313213), we get a palindrome (53352522525335).

The spelling of 31231320212122 in words is "thirty-one trillion, two hundred thirty-one billion, three hundred twenty million, two hundred twelve thousand, one hundred twenty-two".