21120212102222 has 16 divisors (see below), whose sum is σ = 31819393691280. Its totient is φ = 10513756395072.

The previous prime is 21120212102149. The next prime is 21120212102233. The reversal of 21120212102222 is 22220121202112.

It is a junction number, because it is equal to n+sod(n) for n = 21120212102194 and 21120212102203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2571788 + ... + 6989600.

It is an arithmetic number, because the mean of its divisors is an integer number (1988712105705).

Almost surely, 2^{21120212102222} is an apocalyptic number.

21120212102222 is a deficient number, since it is larger than the sum of its proper divisors (10699181589058).

21120212102222 is a wasteful number, since it uses less digits than its factorization.

21120212102222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4428307.

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

Adding to 21120212102222 its reverse (22220121202112), we get a palindrome (43340333304334).

The spelling of 21120212102222 in words is "twenty-one trillion, one hundred twenty billion, two hundred twelve million, one hundred two thousand, two hundred twenty-two".