31012002101 has 4 divisors (see below), whose sum is σ = 31474867872. Its totient is φ = 30549136332.

The previous prime is 31012002083. The next prime is 31012002149. The reversal of 31012002101 is 10120021013.

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 a cyclic number.

It is not a de Polignac number, because 31012002101 - 2¹⁴ = 31011985717 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 (31012002001) 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, 231432785 + ... + 231432918.

It is an arithmetic number, because the mean of its divisors is an integer number (7868716968).

Almost surely, 2^31012002101 is an apocalyptic number.

It is an amenable number.

31012002101 is a deficient number, since it is larger than the sum of its proper divisors (462865771).

31012002101 is an equidigital number, since it uses as much as digits as its factorization.

31012002101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462865770.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 31012002101 its reverse (10120021013), we get a palindrome (41132023114).

It can be divided in two parts, 3 and 1012002101, that multiplied together give a palindrome (3036006303).

The spelling of 31012002101 in words is "thirty-one billion, twelve million, two thousand, one hundred one".