21222220000010 has 8 divisors (see below), whose sum is σ = 38199996000036. Its totient is φ = 8488888000000.

The previous prime is 21222219999983. The next prime is 21222220000027. The reversal of 21222220000010 is 1000002222212.

It can be written as a sum of positive squares in 2 ways, for example, as 21099792089401 + 122427910609 = 4593451^2 + 349897^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21222220000010.

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, 1061110999991 + ... + 1061111000010.

Almost surely, 2^{21222220000010} is an apocalyptic number.

21222220000010 is a deficient number, since it is larger than the sum of its proper divisors (16977776000026).

21222220000010 is a wasteful number, since it uses less digits than its factorization.

21222220000010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2122222000008.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21222220000010 its reverse (1000002222212), we get a palindrome (22222222222222).

The spelling of 21222220000010 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred twenty million, ten", and thus it is an aban number.