31112201101 has 2 divisors, whose sum is σ = 31112201102. Its totient is φ = 31112201100.

The previous prime is 31112201053. The next prime is 31112201119. The reversal of 31112201101 is 10110221113.

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., 27274522500 + 3837678601 = 165150^2 + 61949^2 .

It is a cyclic number.

It is not a de Polignac number, because 31112201101 - 2²¹ = 31110103949 is a prime.

It is a super-2 number, since 2×31112201101² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31112201161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15556100550 + 15556100551.

It is an arithmetic number, because the mean of its divisors is an integer number (15556100551).

Almost surely, 2^31112201101 is an apocalyptic number.

It is an amenable number.

31112201101 is a deficient number, since it is larger than the sum of its proper divisors (1).

31112201101 is an equidigital number, since it uses as much as digits as its factorization.

31112201101 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 31112201101 its reverse (10110221113), we get a palindrome (41222422214).

The spelling of 31112201101 in words is "thirty-one billion, one hundred twelve million, two hundred one thousand, one hundred one".