2121000312 has 32 divisors (see below), whose sum is σ = 5304297600. Its totient is φ = 706760544.

The previous prime is 2121000311. The next prime is 2121000313. The reversal of 2121000312 is 2130001212.

It is an interprime number because it is at equal distance from previous prime (2121000311) and next prime (2121000313).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121000311) 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, 66343 + ... + 92969.

It is an arithmetic number, because the mean of its divisors is an integer number (165759300).

Almost surely, 2^2121000312 is an apocalyptic number.

It is an amenable number.

2121000312 is an abundant number, since it is smaller than the sum of its proper divisors (3183297288).

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

2121000312 is a wasteful number, since it uses less digits than its factorization.

2121000312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29955 (or 29951 counting only the distinct ones).

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

The square root of 2121000312 is about 46054.3191459824. The cubic root of 2121000312 is about 1284.8336750715.

Adding to 2121000312 its reverse (2130001212), we get a palindrome (4251001524).

The spelling of 2121000312 in words is "two billion, one hundred twenty-one million, three hundred twelve", and thus it is an aban number.