21220013214 has 12 divisors (see below), whose sum is σ = 45976695336. Its totient is φ = 7073337732.

The previous prime is 21220013203. The next prime is 21220013251. The reversal of 21220013214 is 41231002212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1178889623 = 21220013214 / (2 + 1 + 2 + 2 + 0 + 0 + 1 + 3 + 2 + 1 + 4).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 589444794 + ... + 589444829.

It is an arithmetic number, because the mean of its divisors is an integer number (3831391278).

Almost surely, 2^21220013214 is an apocalyptic number.

21220013214 is an abundant number, since it is smaller than the sum of its proper divisors (24756682122).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21220013214 is a wasteful number, since it uses less digits than its factorization.

21220013214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1178889631 (or 1178889628 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21220013214 its reverse (41231002212), we get a palindrome (62451015426).

The spelling of 21220013214 in words is "twenty-one billion, two hundred twenty million, thirteen thousand, two hundred fourteen".