2112240021 has 24 divisors (see below), whose sum is σ = 3000013824. Its totient is φ = 1321658880.

The previous prime is 2112240017. The next prime is 2112240037. The reversal of 2112240021 is 1200422112.

It is not a de Polignac number, because 2112240021 - 2² = 2112240017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112240071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 328881 + ... + 335241.

It is an arithmetic number, because the mean of its divisors is an integer number (125000576).

Almost surely, 2^2112240021 is an apocalyptic number.

It is an amenable number.

2112240021 is a deficient number, since it is larger than the sum of its proper divisors (887773803).

2112240021 is a wasteful number, since it uses less digits than its factorization.

2112240021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6781 (or 6764 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 2112240021 is about 45959.1124914309. The cubic root of 2112240021 is about 1283.0623334147.

Adding to 2112240021 its reverse (1200422112), we get a palindrome (3312662133).

The spelling of 2112240021 in words is "two billion, one hundred twelve million, two hundred forty thousand, twenty-one".