21214224412 has 6 divisors (see below), whose sum is σ = 37124892728. Its totient is φ = 10607112204.

The previous prime is 21214224379. The next prime is 21214224433. The reversal of 21214224412 is 21442241212.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2651778048 + ... + 2651778055.

Almost surely, 2^21214224412 is an apocalyptic number.

It is an amenable number.

21214224412 is a deficient number, since it is larger than the sum of its proper divisors (15910668316).

21214224412 is a wasteful number, since it uses less digits than its factorization.

21214224412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5303556107 (or 5303556105 counting only the distinct ones).

The product of its digits is 2048, while the sum is 25.

Adding to 21214224412 its reverse (21442241212), we get a palindrome (42656465624).

The spelling of 21214224412 in words is "twenty-one billion, two hundred fourteen million, two hundred twenty-four thousand, four hundred twelve".