31122110101 has 2 divisors, whose sum is σ = 31122110102. Its totient is φ = 31122110100.

The previous prime is 31122110081. The next prime is 31122110111. The reversal of 31122110101 is 10101122113.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26203191876 + 4918918225 = 161874^2 + 70135^2 .

It is a cyclic number.

It is not a de Polignac number, because 31122110101 - 2¹⁵ = 31122077333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31122110111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15561055050 + 15561055051.

It is an arithmetic number, because the mean of its divisors is an integer number (15561055051).

Almost surely, 2^31122110101 is an apocalyptic number.

It is an amenable number.

31122110101 is a deficient number, since it is larger than the sum of its proper divisors (1).

31122110101 is an equidigital number, since it uses as much as digits as its factorization.

31122110101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 31122110101 its reverse (10101122113), we get a palindrome (41223232214).

The spelling of 31122110101 in words is "thirty-one billion, one hundred twenty-two million, one hundred ten thousand, one hundred one".