31122201121 has 16 divisors (see below), whose sum is σ = 37188253440. Its totient is φ = 25710388480.

The previous prime is 31122201119. The next prime is 31122201133. The reversal of 31122201121 is 12110222113.

It is not a de Polignac number, because 31122201121 - 2¹ = 31122201119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31122201095 and 31122201104.

It is not an unprimeable number, because it can be changed into a prime (31122201181) 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, 2864041 + ... + 2874886.

It is an arithmetic number, because the mean of its divisors is an integer number (2324265840).

Almost surely, 2^31122201121 is an apocalyptic number.

It is an amenable number.

31122201121 is a deficient number, since it is larger than the sum of its proper divisors (6066052319).

31122201121 is a wasteful number, since it uses less digits than its factorization.

31122201121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5738984.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 31122201121 its reverse (12110222113), we get a palindrome (43232423234).

The spelling of 31122201121 in words is "thirty-one billion, one hundred twenty-two million, two hundred one thousand, one hundred twenty-one".