2121113444 has 12 divisors (see below), whose sum is σ = 3715181568. Its totient is φ = 1059633000.

The previous prime is 2121113437. The next prime is 2121113471. The reversal of 2121113444 is 4443111212.

It is a super-2 number, since 2×2121113444² = 8998244484635082272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225752 + ... + 234959.

It is an arithmetic number, because the mean of its divisors is an integer number (309598464).

Almost surely, 2^2121113444 is an apocalyptic number.

It is an amenable number.

2121113444 is a deficient number, since it is larger than the sum of its proper divisors (1594068124).

2121113444 is a wasteful number, since it uses less digits than its factorization.

2121113444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461866 (or 461864 counting only the distinct ones).

The product of its digits is 768, while the sum is 23.

The square root of 2121113444 is about 46055.5473748820. The cubic root of 2121113444 is about 1284.8565185727.

Adding to 2121113444 its reverse (4443111212), we get a palindrome (6564224656).

The spelling of 2121113444 in words is "two billion, one hundred twenty-one million, one hundred thirteen thousand, four hundred forty-four".