2121210012 has 12 divisors (see below), whose sum is σ = 4949490056. Its totient is φ = 707070000.

The previous prime is 2121210011. The next prime is 2121210019. The reversal of 2121210012 is 2100121212.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×2121210012³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12), and also a Moran number because the ratio is a prime number: 176767501 = 2121210012 / (2 + 1 + 2 + 1 + 2 + 1 + 0 + 0 + 1 + 2).

It is a self number, because there is not a number n which added to its sum of digits gives 2121210012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121210011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88383739 + ... + 88383762.

Almost surely, 2^2121210012 is an apocalyptic number.

It is an amenable number.

2121210012 is an abundant number, since it is smaller than the sum of its proper divisors (2828280044).

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

2121210012 is a wasteful number, since it uses less digits than its factorization.

2121210012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176767508 (or 176767506 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 2121210012 is about 46056.5957491432. The cubic root of 2121210012 is about 1284.8760168448.

Adding to 2121210012 its reverse (2100121212), we get a palindrome (4221331224).

The spelling of 2121210012 in words is "two billion, one hundred twenty-one million, two hundred ten thousand, twelve".