20221111002120 has 256 divisors, whose sum is σ = 71710019297280. Its totient is φ = 4465457510400.

The previous prime is 20221111002047. The next prime is 20221111002133. The reversal of 20221111002120 is 2120011112202.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20221111002120.

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, 697125 + ... + 6397515.

It is an arithmetic number, because the mean of its divisors is an integer number (280117262880).

Almost surely, 2^{20221111002120} is an apocalyptic number.

20221111002120 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 20221111002120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35855009648640).

20221111002120 is an abundant number, since it is smaller than the sum of its proper divisors (51488908295160).

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

20221111002120 is a wasteful number, since it uses less digits than its factorization.

20221111002120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5700556 (or 5700552 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20221111002120 its reverse (2120011112202), we get a palindrome (22341122114322).

The spelling of 20221111002120 in words is "twenty trillion, two hundred twenty-one billion, one hundred eleven million, two thousand, one hundred twenty".