20202222121100 has 72 divisors (see below), whose sum is σ = 44498527203648. Its totient is φ = 7959313454400.

The previous prime is 20202222121093. The next prime is 20202222121163. The reversal of 20202222121100 is 112122220202.

It is a happy number.

It is a super-4 number, since 4×20202222121100⁴ (a number of 54 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56389535 + ... + 56746665.

Almost surely, 2^{20202222121100} is an apocalyptic number.

20202222121100 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 20202222121100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22249263601824).

20202222121100 is an abundant number, since it is smaller than the sum of its proper divisors (24296305082548).

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

20202222121100 is a wasteful number, since it uses less digits than its factorization.

20202222121100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365655 (or 365648 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20202222121100 its reverse (112122220202), we get a palindrome (20314344341302).

The spelling of 20202222121100 in words is "twenty trillion, two hundred two billion, two hundred twenty-two million, one hundred twenty-one thousand, one hundred".