2012022121 has 4 divisors (see below), whose sum is σ = 2012171392. Its totient is φ = 2011872852.

The previous prime is 2012022079. The next prime is 2012022139. The reversal of 2012022121 is 1212202102.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 2012022121 - 2²⁷ = 1877804393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2012022161) 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, 52161 + ... + 82126.

It is an arithmetic number, because the mean of its divisors is an integer number (503042848).

Almost surely, 2^2012022121 is an apocalyptic number.

It is an amenable number.

2012022121 is a deficient number, since it is larger than the sum of its proper divisors (149271).

2012022121 is a wasteful number, since it uses less digits than its factorization.

2012022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149270.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2012022121 is about 44855.5695649938. The cubic root of 2012022121 is about 1262.4404956564.

Adding to 2012022121 its reverse (1212202102), we get a palindrome (3224224223).

The spelling of 2012022121 in words is "two billion, twelve million, twenty-two thousand, one hundred twenty-one".