21224442212 has 12 divisors (see below), whose sum is σ = 37193869440. Its totient is φ = 10597622376.

The previous prime is 21224442203. The next prime is 21224442221.

21224442212 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (21224442203) and next prime (21224442221).

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 3 ways as a sum of consecutive naturals, for example, 3646412 + ... + 3652227.

It is an arithmetic number, because the mean of its divisors is an integer number (3099489120).

Almost surely, 2^21224442212 is an apocalyptic number.

It is an amenable number.

21224442212 is a deficient number, since it is larger than the sum of its proper divisors (15969427228).

21224442212 is a wasteful number, since it uses less digits than its factorization.

21224442212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7299370 (or 7299368 counting only the distinct ones).

The product of its digits is 4096, while the sum is 26.

The spelling of 21224442212 in words is "twenty-one billion, two hundred twenty-four million, four hundred forty-two thousand, two hundred twelve".