21122102122222 has 8 divisors (see below), whose sum is σ = 32009783628816. Its totient is φ = 10452174245952.

The previous prime is 21122102122127. The next prime is 21122102122243. The reversal of 21122102122222 is 22222120122112.

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

It is a super-2 number, since 2×21122102122222² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21122102122193 and 21122102122202.

It is a congruent number.

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, 54438407338 + ... + 54438407725.

It is an arithmetic number, because the mean of its divisors is an integer number (4001222953602).

Almost surely, 2^{21122102122222} is an apocalyptic number.

21122102122222 is a deficient number, since it is larger than the sum of its proper divisors (10887681506594).

21122102122222 is a wasteful number, since it uses less digits than its factorization.

21122102122222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108876815162.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 21122102122222 its reverse (22222120122112), we get a palindrome (43344222244334).

The spelling of 21122102122222 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred two million, one hundred twenty-two thousand, two hundred twenty-two".