2012440121 has 4 divisors (see below), whose sum is σ = 2013725952. Its totient is φ = 2011154292.

The previous prime is 2012440099. The next prime is 2012440147. The reversal of 2012440121 is 1210442102.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1210442102 = 2 ⋅605221051.

It is a cyclic number.

It is not a de Polignac number, because 2012440121 - 2²² = 2008245817 is a prime.

It is a super-2 number, since 2×2012440121² = 8099830481220989282, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2012440121.

It is not an unprimeable number, because it can be changed into a prime (2012440151) 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, 640565 + ... + 643698.

It is an arithmetic number, because the mean of its divisors is an integer number (503431488).

Almost surely, 2^2012440121 is an apocalyptic number.

It is an amenable number.

2012440121 is a deficient number, since it is larger than the sum of its proper divisors (1285831).

2012440121 is a wasteful number, since it uses less digits than its factorization.

2012440121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1285830.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 2012440121 is about 44860.2287221097. The cubic root of 2012440121 is about 1262.5279141101.

Adding to 2012440121 its reverse (1210442102), we get a palindrome (3222882223).

The spelling of 2012440121 in words is "two billion, twelve million, four hundred forty thousand, one hundred twenty-one".