31122223101 has 6 divisors (see below), whose sum is σ = 44954322270. Its totient is φ = 20748148728.

The previous prime is 31122223081. The next prime is 31122223157. The reversal of 31122223101 is 10132222113.

31122223101 is a `hidden beast` number, since 311 + 22 + 22 + 310 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 30949957476 + 172265625 = 175926^2 + 13125^2 .

It is not a de Polignac number, because 31122223101 - 2⁶ = 31122223037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31122223001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1729012386 + ... + 1729012403.

It is an arithmetic number, because the mean of its divisors is an integer number (7492387045).

Almost surely, 2^31122223101 is an apocalyptic number.

It is an amenable number.

31122223101 is a deficient number, since it is larger than the sum of its proper divisors (13832099169).

31122223101 is a wasteful number, since it uses less digits than its factorization.

31122223101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3458024795 (or 3458024792 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 31122223101 its reverse (10132222113), we get a palindrome (41254445214).

The spelling of 31122223101 in words is "thirty-one billion, one hundred twenty-two million, two hundred twenty-three thousand, one hundred one".