31211121122 has 16 divisors (see below), whose sum is σ = 46885519872. Its totient is φ = 15582632640.

The previous prime is 31211121121. The next prime is 31211121131. The reversal of 31211121122 is 22112111213.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 31211121122.

It is not an unprimeable number, because it can be changed into a prime (31211121121) 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, 5889578 + ... + 5894874.

It is an arithmetic number, because the mean of its divisors is an integer number (2930344992).

Almost surely, 2^31211121122 is an apocalyptic number.

31211121122 is a deficient number, since it is larger than the sum of its proper divisors (15674398750).

31211121122 is a wasteful number, since it uses less digits than its factorization.

31211121122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9073.

The product of its digits is 48, while the sum is 17.

Adding to 31211121122 its reverse (22112111213), we get a palindrome (53323232335).

Subtracting from 31211121122 its reverse (22112111213), we obtain a palindrome (9099009909).

The spelling of 31211121122 in words is "thirty-one billion, two hundred eleven million, one hundred twenty-one thousand, one hundred twenty-two".