31012120101 has 16 divisors (see below), whose sum is σ = 42688235520. Its totient is φ = 20005528560.

The previous prime is 31012120091. The next prime is 31012120151. The reversal of 31012120101 is 10102121013.

It is not a de Polignac number, because 31012120101 - 2⁶ = 31012120037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31012120151) 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 15 ways as a sum of consecutive naturals, for example, 1245310 + ... + 1269968.

It is an arithmetic number, because the mean of its divisors is an integer number (2668014720).

Almost surely, 2^31012120101 is an apocalyptic number.

31012120101 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

31012120101 is a deficient number, since it is larger than the sum of its proper divisors (11676115419).

31012120101 is a wasteful number, since it uses less digits than its factorization.

31012120101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38216.

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

Adding to 31012120101 its reverse (10102121013), we get a palindrome (41114241114).

The spelling of 31012120101 in words is "thirty-one billion, twelve million, one hundred twenty thousand, one hundred one".