21102022121222 has 48 divisors (see below), whose sum is σ = 36902889934848. Its totient is φ = 9023586319440.

The previous prime is 21102022121207. The next prime is 21102022121227. The reversal of 21102022121222 is 22212122020112.

It is a junction number, because it is equal to n+sod(n) for n = 21102022121194 and 21102022121203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102022121227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 299254493 + ... + 299324999.

It is an arithmetic number, because the mean of its divisors is an integer number (768810206976).

Almost surely, 2^{21102022121222} is an apocalyptic number.

21102022121222 is a deficient number, since it is larger than the sum of its proper divisors (15800867813626).

21102022121222 is a wasteful number, since it uses less digits than its factorization.

21102022121222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77281 (or 77274 counting only the distinct ones).

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

Adding to 21102022121222 its reverse (22212122020112), we get a palindrome (43314144141334).

The spelling of 21102022121222 in words is "twenty-one trillion, one hundred two billion, twenty-two million, one hundred twenty-one thousand, two hundred twenty-two".