2012121121 has 8 divisors (see below), whose sum is σ = 2100669120. Its totient is φ = 1923661872.

The previous prime is 2012121113. The next prime is 2012121127. The reversal of 2012121121 is 1211212102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2012121121 - 2³ = 2012121113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2012121127) 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, 26446 + ... + 68728.

It is an arithmetic number, because the mean of its divisors is an integer number (262583640).

Almost surely, 2^2012121121 is an apocalyptic number.

It is an amenable number.

2012121121 is a deficient number, since it is larger than the sum of its proper divisors (88547999).

2012121121 is a wasteful number, since it uses less digits than its factorization.

2012121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44375.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 2012121121 is about 44856.6730933091. The cubic root of 2012121121 is about 1262.4612011212.

Adding to 2012121121 its reverse (1211212102), we get a palindrome (3223333223).

The spelling of 2012121121 in words is "two billion, twelve million, one hundred twenty-one thousand, one hundred twenty-one".