21102120022222 has 8 divisors (see below), whose sum is σ = 31653240606000. Its totient is φ = 10551039820224.

The previous prime is 21102120022213. The next prime is 21102120022229. The reversal of 21102120022222 is 22222002120112.

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 21102120022222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102120022229) 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, 8753347 + ... + 10900702.

It is an arithmetic number, because the mean of its divisors is an integer number (3956655075750).

Almost surely, 2^{21102120022222} is an apocalyptic number.

21102120022222 is a deficient number, since it is larger than the sum of its proper divisors (10551120583778).

21102120022222 is a wasteful number, since it uses less digits than its factorization.

21102120022222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20190890.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21102120022222 its reverse (22222002120112), we get a palindrome (43324122142334).

The spelling of 21102120022222 in words is "twenty-one trillion, one hundred two billion, one hundred twenty million, twenty-two thousand, two hundred twenty-two".