2100021220122 has 128 divisors (see below), whose sum is σ = 5086126080000. Its totient is φ = 564668750016.

The previous prime is 2100021220109. The next prime is 2100021220133. The reversal of 2100021220122 is 2210221200012.

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, 266394793 + ... + 266402675.

It is an arithmetic number, because the mean of its divisors is an integer number (39735360000).

Almost surely, 2^{2100021220122} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2100021220122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2543063040000).

2100021220122 is an abundant number, since it is smaller than the sum of its proper divisors (2986104859878).

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

2100021220122 is a wasteful number, since it uses less digits than its factorization.

2100021220122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10080.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 2100021220122 its reverse (2210221200012), we get a palindrome (4310242420134).

The spelling of 2100021220122 in words is "two trillion, one hundred billion, twenty-one million, two hundred twenty thousand, one hundred twenty-two".