31340221311 has 16 divisors (see below), whose sum is σ = 49297061888. Its totient is φ = 17330997600.

The previous prime is 31340221301. The next prime is 31340221357. The reversal of 31340221311 is 11312204313.

It is not a de Polignac number, because 31340221311 - 2⁷ = 31340221183 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31340221301) 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, 24070180 + ... + 24071481.

It is an arithmetic number, because the mean of its divisors is an integer number (3081066368).

Almost surely, 2^31340221311 is an apocalyptic number.

31340221311 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

31340221311 is a deficient number, since it is larger than the sum of its proper divisors (17956840577).

31340221311 is a wasteful number, since it uses less digits than its factorization.

31340221311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48141702.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 31340221311 its reverse (11312204313), we get a palindrome (42652425624).

The spelling of 31340221311 in words is "thirty-one billion, three hundred forty million, two hundred twenty-one thousand, three hundred eleven".