31203211120311 has 16 divisors (see below), whose sum is σ = 43414115106816. Its totient is φ = 19897263599136.

The previous prime is 31203211120297. The next prime is 31203211120363. The reversal of 31203211120311 is 11302111230213.

It is not a de Polignac number, because 31203211120311 - 2¹¹ = 31203211118263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31203211160311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1772640 + ... + 8096213.

It is an arithmetic number, because the mean of its divisors is an integer number (2713382194176).

Almost surely, 2^{31203211120311} is an apocalyptic number.

31203211120311 is a deficient number, since it is larger than the sum of its proper divisors (12210903986505).

31203211120311 is a wasteful number, since it uses less digits than its factorization.

31203211120311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9914702.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 31203211120311 its reverse (11302111230213), we get a palindrome (42505322350524).

The spelling of 31203211120311 in words is "thirty-one trillion, two hundred three billion, two hundred eleven million, one hundred twenty thousand, three hundred eleven".