31220122101 has 24 divisors (see below), whose sum is σ = 49036014720. Its totient is φ = 17614239552.

The previous prime is 31220122051. The next prime is 31220122123. The reversal of 31220122101 is 10122102213.

It is not a de Polignac number, because 31220122101 - 2⁷ = 31220121973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31220122301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1332576 + ... + 1355801.

It is an arithmetic number, because the mean of its divisors is an integer number (2043167280).

Almost surely, 2^31220122101 is an apocalyptic number.

It is an amenable number.

31220122101 is a deficient number, since it is larger than the sum of its proper divisors (17815892619).

31220122101 is a wasteful number, since it uses less digits than its factorization.

31220122101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2688473 (or 2688466 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 31220122101 its reverse (10122102213), we get a palindrome (41342224314).

The spelling of 31220122101 in words is "thirty-one billion, two hundred twenty million, one hundred twenty-two thousand, one hundred one".