21222031010416 has 20 divisors (see below), whose sum is σ = 41118208816552. Its totient is φ = 10610880348096.

The previous prime is 21222031010413. The next prime is 21222031010443. The reversal of 21222031010416 is 61401013022212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222031010413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7145850 + ... + 9669913.

Almost surely, 2^{21222031010416} is an apocalyptic number.

It is an amenable number.

21222031010416 is a deficient number, since it is larger than the sum of its proper divisors (19896177806136).

21222031010416 is a wasteful number, since it uses less digits than its factorization.

21222031010416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16894648 (or 16894642 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 21222031010416 its reverse (61401013022212), we get a palindrome (82623044032628).

The spelling of 21222031010416 in words is "twenty-one trillion, two hundred twenty-two billion, thirty-one million, ten thousand, four hundred sixteen".