21220122101022 has 224 divisors, whose sum is σ = 52783332104160. Its totient is φ = 6355018425600.

The previous prime is 21220122101011. The next prime is 21220122101041. The reversal of 21220122101022 is 22010122102212.

It is a happy number.

21220122101022 is a `hidden beast` number, since 212 + 201 + 221 + 0 + 10 + 22 = 666.

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 = 21220122100986 and 21220122101004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 112852948 + ... + 113040824.

It is an arithmetic number, because the mean of its divisors is an integer number (235639875465).

Almost surely, 2^{21220122101022} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21220122101022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26391666052080).

21220122101022 is an abundant number, since it is smaller than the sum of its proper divisors (31563210003138).

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

21220122101022 is a wasteful number, since it uses less digits than its factorization.

21220122101022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188070 (or 188055 counting only the distinct ones).

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

Adding to 21220122101022 its reverse (22010122102212), we get a palindrome (43230244203234).

The spelling of 21220122101022 in words is "twenty-one trillion, two hundred twenty billion, one hundred twenty-two million, one hundred one thousand, twenty-two".