20201222221110 has 192 divisors, whose sum is σ = 60493054003200. Its totient is φ = 4581614658816.

The previous prime is 20201222221087. The next prime is 20201222221111. The reversal of 20201222221110 is 1112222210202.

It is a happy number.

20201222221110 is a `hidden beast` number, since 20 + 201 + 2 + 222 + 211 + 10 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201222221111) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 70974261 + ... + 71258319.

It is an arithmetic number, because the mean of its divisors is an integer number (315067989600).

Almost surely, 2^{20201222221110} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20201222221110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30246527001600).

20201222221110 is an abundant number, since it is smaller than the sum of its proper divisors (40291831782090).

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

20201222221110 is a wasteful number, since it uses less digits than its factorization.

20201222221110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284955 (or 284952 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20201222221110 its reverse (1112222210202), we get a palindrome (21313444431312).

The spelling of 20201222221110 in words is "twenty trillion, two hundred one billion, two hundred twenty-two million, two hundred twenty-one thousand, one hundred ten".