31302010030121 has 4 divisors (see below), whose sum is σ = 31512090634500. Its totient is φ = 31091929425744.

The previous prime is 31302010030117. The next prime is 31302010030153. The reversal of 31302010030121 is 12103001020313.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7131650365225 + 24170359664896 = 2670515^2 + 4916336^2 .

It is a cyclic number.

It is not a de Polignac number, because 31302010030121 - 2² = 31302010030117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31302010030121.

It is not an unprimeable number, because it can be changed into a prime (31302010050121) 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, 105040301966 + ... + 105040302263.

It is an arithmetic number, because the mean of its divisors is an integer number (7878022658625).

Almost surely, 2^{31302010030121} is an apocalyptic number.

It is an amenable number.

31302010030121 is a deficient number, since it is larger than the sum of its proper divisors (210080604379).

31302010030121 is a wasteful number, since it uses less digits than its factorization.

31302010030121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210080604378.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 31302010030121 its reverse (12103001020313), we get a palindrome (43405011050434).

The spelling of 31302010030121 in words is "thirty-one trillion, three hundred two billion, ten million, thirty thousand, one hundred twenty-one".