31342012221 has 16 divisors (see below), whose sum is σ = 45013250240. Its totient is φ = 19283391360.

The previous prime is 31342012211. The next prime is 31342012223. The reversal of 31342012221 is 12221024313.

It is not a de Polignac number, because 31342012221 - 2¹⁷ = 31341881149 is a prime.

It is a super-2 number, since 2×31342012221² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31342012223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112926 + ... + 274656.

It is an arithmetic number, because the mean of its divisors is an integer number (2813328140).

Almost surely, 2^31342012221 is an apocalyptic number.

It is an amenable number.

31342012221 is a deficient number, since it is larger than the sum of its proper divisors (13671238019).

31342012221 is a wasteful number, since it uses less digits than its factorization.

31342012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166716.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 31342012221 its reverse (12221024313), we get a palindrome (43563036534).

The spelling of 31342012221 in words is "thirty-one billion, three hundred forty-two million, twelve thousand, two hundred twenty-one".