21022102210122 has 96 divisors (see below), whose sum is σ = 49444872422400. Its totient is φ = 6454829485728.

The previous prime is 21022102210103. The next prime is 21022102210141. The reversal of 21022102210122 is 22101220122012.

It is a happy number.

21022102210122 is a `hidden beast` number, since 210 + 2 + 210 + 221 + 0 + 1 + 22 = 666.

It is an interprime number because it is at equal distance from previous prime (21022102210103) and next prime (21022102210141).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21022102210095 and 21022102210104.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18387643 + ... + 19497425.

It is an arithmetic number, because the mean of its divisors is an integer number (515050754400).

Almost surely, 2^{21022102210122} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21022102210122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24722436211200).

21022102210122 is an abundant number, since it is smaller than the sum of its proper divisors (28422770212278).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21022102210122 is a wasteful number, since it uses less digits than its factorization.

21022102210122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110309 (or 1110280 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21022102210122 its reverse (22101220122012), we get a palindrome (43123322332134).

The spelling of 21022102210122 in words is "twenty-one trillion, twenty-two billion, one hundred two million, two hundred ten thousand, one hundred twenty-two".