31012131101 has 4 divisors (see below), whose sum is σ = 35442435552. Its totient is φ = 26581826652.

The previous prime is 31012131071. The next prime is 31012131131. The reversal of 31012131101 is 10113121013.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (31012131071) and next prime (31012131131).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31012131101 is a prime.

It is a super-2 number, since 2×31012131101² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31012131131) 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 3 ways as a sum of consecutive naturals, for example, 2215152215 + ... + 2215152228.

It is an arithmetic number, because the mean of its divisors is an integer number (8860608888).

Almost surely, 2^31012131101 is an apocalyptic number.

It is an amenable number.

31012131101 is a deficient number, since it is larger than the sum of its proper divisors (4430304451).

31012131101 is an equidigital number, since it uses as much as digits as its factorization.

31012131101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4430304450.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 31012131101 its reverse (10113121013), we get a palindrome (41125252114).

The spelling of 31012131101 in words is "thirty-one billion, twelve million, one hundred thirty-one thousand, one hundred one".