2021122000 has 80 divisors (see below), whose sum is σ = 4960343232. Its totient is φ = 796329600.

The previous prime is 2021121983. The next prime is 2021122001. The reversal of 2021122000 is 2211202.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021122001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126459 + ... + 141541.

Almost surely, 2^2021122000 is an apocalyptic number.

2021122000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2021122000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2480171616).

2021122000 is an abundant number, since it is smaller than the sum of its proper divisors (2939221232).

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

2021122000 is a wasteful number, since it uses less digits than its factorization.

2021122000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15173 (or 15157 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 2021122000 is about 44956.8904618636. The cubic root of 2021122000 is about 1264.3408690517.

Adding to 2021122000 its reverse (2211202), we get a palindrome (2023333202).

The spelling of 2021122000 in words is "two billion, twenty-one million, one hundred twenty-two thousand".