2121320012 has 24 divisors (see below), whose sum is σ = 4258427040. Its totient is φ = 905754240.

The previous prime is 2121320011. The next prime is 2121320017. The reversal of 2121320012 is 2100231212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (2121320011) 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, 133289 + ... + 148352.

It is an arithmetic number, because the mean of its divisors is an integer number (177434460).

Almost surely, 2^2121320012 is an apocalyptic number.

It is an amenable number.

2121320012 is an abundant number, since it is smaller than the sum of its proper divisors (2137107028).

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

2121320012 is a wasteful number, since it uses less digits than its factorization.

2121320012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281921 (or 281919 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2121320012 is about 46057.7899165820. The cubic root of 2121320012 is about 1284.8982264827.

Adding to 2121320012 its reverse (2100231212), we get a palindrome (4221551224).

The spelling of 2121320012 in words is "two billion, one hundred twenty-one million, three hundred twenty thousand, twelve".