2021021122120 has 512 divisors, whose sum is σ = 6258780057600. Its totient is φ = 567046656000.

The previous prime is 2021021122069. The next prime is 2021021122181. The reversal of 2021021122120 is 212211201202.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2021021122094 and 2021021122103.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 270946951 + ... + 270954409.

It is an arithmetic number, because the mean of its divisors is an integer number (12224179800).

Almost surely, 2^{2021021122120} is an apocalyptic number.

2021021122120 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 2021021122120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3129390028800).

2021021122120 is an abundant number, since it is smaller than the sum of its proper divisors (4237758935480).

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

2021021122120 is a wasteful number, since it uses less digits than its factorization.

2021021122120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7669 (or 7665 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2021021122120 its reverse (212211201202), we get a palindrome (2233232323322).

The spelling of 2021021122120 in words is "two trillion, twenty-one billion, twenty-one million, one hundred twenty-two thousand, one hundred twenty".