2012210121 has 4 divisors (see below), whose sum is σ = 2682946832. Its totient is φ = 1341473412.

The previous prime is 2012210041. The next prime is 2012210171. The reversal of 2012210121 is 1210122102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2012210121 - 2¹¹ = 2012208073 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2012210097 and 2012210106.

It is not an unprimeable number, because it can be changed into a prime (2012210171) 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, 335368351 + ... + 335368356.

It is an arithmetic number, because the mean of its divisors is an integer number (670736708).

Almost surely, 2^2012210121 is an apocalyptic number.

It is an amenable number.

2012210121 is a deficient number, since it is larger than the sum of its proper divisors (670736711).

2012210121 is an equidigital number, since it uses as much as digits as its factorization.

2012210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670736710.

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

The square root of 2012210121 is about 44857.6651309450. The cubic root of 2012210121 is about 1262.4798145451.

Adding to 2012210121 its reverse (1210122102), we get a palindrome (3222332223).

The spelling of 2012210121 in words is "two billion, twelve million, two hundred ten thousand, one hundred twenty-one".