21114412 has 24 divisors (see below), whose sum is σ = 40465152. Its totient is φ = 9560400.

The previous prime is 21114403. The next prime is 21114427. The reversal of 21114412 is 21441112.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12913 + ... + 14455.

It is an arithmetic number, because the mean of its divisors is an integer number (1686048).

Almost surely, 2^21114412 is an apocalyptic number.

21114412 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21114412 is a deficient number, since it is larger than the sum of its proper divisors (19350740).

21114412 is a wasteful number, since it uses less digits than its factorization.

21114412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1869 (or 1867 counting only the distinct ones).

The product of its digits is 64, while the sum is 16.

The square root of 21114412 is about 4595.0421107972. The cubic root of 21114412 is about 276.3925486126.

Adding to 21114412 its reverse (21441112), we get a palindrome (42555524).

It can be divided in two parts, 21114 and 412, that multiplied together give a palindrome (8698968).

The spelling of 21114412 in words is "twenty-one million, one hundred fourteen thousand, four hundred twelve".