31122020122 has 32 divisors (see below), whose sum is σ = 49748806800. Its totient is φ = 14551200768.

The previous prime is 31122020099. The next prime is 31122020129. The reversal of 31122020122 is 22102022113.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 23191939521 + 7930080601 = 152289^2 + 89051^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31122020096 and 31122020105.

It is not an unprimeable number, because it can be changed into a prime (31122020129) 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, 3959148 + ... + 3967000.

Almost surely, 2^31122020122 is an apocalyptic number.

31122020122 is a deficient number, since it is larger than the sum of its proper divisors (18626786678).

31122020122 is a wasteful number, since it uses less digits than its factorization.

31122020122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8610.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 31122020122 its reverse (22102022113), we get a palindrome (53224042235).

The spelling of 31122020122 in words is "thirty-one billion, one hundred twenty-two million, twenty thousand, one hundred twenty-two".