31112142332221 has 8 divisors (see below), whose sum is σ = 31182354137088. Its totient is φ = 31041942318000.

The previous prime is 31112142332209. The next prime is 31112142332389. The reversal of 31112142332221 is 12223324121113.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31112142332221 - 2⁷ = 31112142332093 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31112142332221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31112142336221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2346436 + ... + 8229826.

It is an arithmetic number, because the mean of its divisors is an integer number (3897794267136).

Almost surely, 2^{31112142332221} is an apocalyptic number.

It is an amenable number.

31112142332221 is a deficient number, since it is larger than the sum of its proper divisors (70211804867).

31112142332221 is a wasteful number, since it uses less digits than its factorization.

31112142332221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5895323.

The product of its digits is 3456, while the sum is 28.

Adding to 31112142332221 its reverse (12223324121113), we get a palindrome (43335466453334).

The spelling of 31112142332221 in words is "thirty-one trillion, one hundred twelve billion, one hundred forty-two million, three hundred thirty-two thousand, two hundred twenty-one".