2102212121022 has 80 divisors (see below), whose sum is σ = 5078982918240. Its totient is φ = 646053703488.

The previous prime is 2102212120963. The next prime is 2102212121083. The reversal of 2102212121022 is 2201212122012.

It is a happy number.

2102212121022 is a `hidden beast` number, since 210 + 221 + 2 + 1 + 210 + 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 = 2102212120986 and 2102212121004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1143823 + ... + 2347925.

It is an arithmetic number, because the mean of its divisors is an integer number (63487286478).

Almost surely, 2^{2102212121022} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2102212121022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2539491459120).

2102212121022 is an abundant number, since it is smaller than the sum of its proper divisors (2976770797218).

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

2102212121022 is a wasteful number, since it uses less digits than its factorization.

2102212121022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1204959 (or 1204950 counting only the distinct ones).

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

Adding to 2102212121022 its reverse (2201212122012), we get a palindrome (4303424243034).

The spelling of 2102212121022 in words is "two trillion, one hundred two billion, two hundred twelve million, one hundred twenty-one thousand, twenty-two".