30312021000 has 64 divisors (see below), whose sum is σ = 94573514880. Its totient is φ = 8083204800.

The previous prime is 30312020989. The next prime is 30312021001. The reversal of 30312021000 is 12021303.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (30312021001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5049004 + ... + 5055003.

It is an arithmetic number, because the mean of its divisors is an integer number (1477711170).

Almost surely, 2^30312021000 is an apocalyptic number.

30312021000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30312021000 is an abundant number, since it is smaller than the sum of its proper divisors (64261493880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30312021000 is a wasteful number, since it uses less digits than its factorization.

30312021000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10104031 (or 10104017 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 30312021000 its reverse (12021303), we get a palindrome (30324042303).

The spelling of 30312021000 in words is "thirty billion, three hundred twelve million, twenty-one thousand".