21202110221222 has 64 divisors (see below), whose sum is σ = 37451555463168. Its totient is φ = 8813092896000.

The previous prime is 21202110221153. The next prime is 21202110221269. The reversal of 21202110221222 is 22212201120212.

It is a junction number, because it is equal to n+sod(n) for n = 21202110221194 and 21202110221203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71562563 + ... + 71858225.

It is an arithmetic number, because the mean of its divisors is an integer number (585180554112).

Almost surely, 2^{21202110221222} is an apocalyptic number.

21202110221222 is a deficient number, since it is larger than the sum of its proper divisors (16249445241946).

21202110221222 is a wasteful number, since it uses less digits than its factorization.

21202110221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296445.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21202110221222 its reverse (22212201120212), we get a palindrome (43414311341434).

The spelling of 21202110221222 in words is "twenty-one trillion, two hundred two billion, one hundred ten million, two hundred twenty-one thousand, two hundred twenty-two".