310020000021 has 8 divisors (see below), whose sum is σ = 459288888960. Its totient is φ = 206679999996.

The previous prime is 310020000001. The next prime is 310020000067. The reversal of 310020000021 is 120000020013.

It is a happy number.

It is not a de Polignac number, because 310020000021 - 2¹⁸ = 310019737877 is a prime.

It is a super-2 number, since 2×310020000021² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 310019999958 and 310020000012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (310020000001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5741111085 + ... + 5741111138.

It is an arithmetic number, because the mean of its divisors is an integer number (57411111120).

Almost surely, 2^310020000021 is an apocalyptic number.

It is an amenable number.

310020000021 is a deficient number, since it is larger than the sum of its proper divisors (149268888939).

310020000021 is a wasteful number, since it uses less digits than its factorization.

310020000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11482222232 (or 11482222226 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

Adding to 310020000021 its reverse (120000020013), we get a palindrome (430020020034).

The spelling of 310020000021 in words is "three hundred ten billion, twenty million, twenty-one", and thus it is an aban number.