31302012101 has 4 divisors (see below), whose sum is σ = 31371727500. Its totient is φ = 31232296704.

The previous prime is 31302012097. The next prime is 31302012103. The reversal of 31302012101 is 10121020313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10121020313 = 25763 ⋅392851.

It can be written as a sum of positive squares in 2 ways, for example, as 6219688225 + 25082323876 = 78865^2 + 158374^2 .

It is a cyclic number.

It is not a de Polignac number, because 31302012101 - 2² = 31302012097 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31302012103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34857026 + ... + 34857923.

It is an arithmetic number, because the mean of its divisors is an integer number (7842931875).

Almost surely, 2^31302012101 is an apocalyptic number.

It is an amenable number.

31302012101 is a deficient number, since it is larger than the sum of its proper divisors (69715399).

31302012101 is an equidigital number, since it uses as much as digits as its factorization.

31302012101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69715398.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 31302012101 its reverse (10121020313), we get a palindrome (41423032414).

The spelling of 31302012101 in words is "thirty-one billion, three hundred two million, twelve thousand, one hundred one".