2121300012 has 48 divisors (see below), whose sum is σ = 5379392480. Its totient is φ = 646714368.

The previous prime is 2121300007. The next prime is 2121300019. The reversal of 2121300012 is 2100031212.

It is a super-2 number, since 2×2121300012² = 8999827481822400288, which contains 22 as substring.

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 (2121300019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45373 + ... + 79380.

Almost surely, 2^2121300012 is an apocalyptic number.

It is an amenable number.

2121300012 is an abundant number, since it is smaller than the sum of its proper divisors (3258092468).

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

2121300012 is a wasteful number, since it uses less digits than its factorization.

2121300012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124882 (or 124880 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 2121300012 is about 46057.5727975324. The cubic root of 2121300012 is about 1284.8941884238.

Adding to 2121300012 its reverse (2100031212), we get a palindrome (4221331224).

The spelling of 2121300012 in words is "two billion, one hundred twenty-one million, three hundred thousand, twelve".