20002121233122 has 128 divisors (see below), whose sum is σ = 47796766617600. Its totient is φ = 5574718961280.

The previous prime is 20002121233099. The next prime is 20002121233177. The reversal of 20002121233122 is 22133212120002.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 864272283 + ... + 864295425.

It is an arithmetic number, because the mean of its divisors is an integer number (373412239200).

Almost surely, 2^{20002121233122} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20002121233122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23898383308800).

20002121233122 is an abundant number, since it is smaller than the sum of its proper divisors (27794645384478).

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

20002121233122 is a wasteful number, since it uses less digits than its factorization.

20002121233122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33453 (or 33439 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 20002121233122 its reverse (22133212120002), we get a palindrome (42135333353124).

The spelling of 20002121233122 in words is "twenty trillion, two billion, one hundred twenty-one million, two hundred thirty-three thousand, one hundred twenty-two".