20011221120222 has 64 divisors (see below), whose sum is σ = 45627541724160. Its totient is φ = 6497528208192.

The previous prime is 20011221120211. The next prime is 20011221120323. The reversal of 20011221120222 is 22202112211002.

It is a happy number.

20011221120222 is a `hidden beast` number, since 200 + 1 + 1 + 221 + 1 + 20 + 222 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 20011221120195 and 20011221120204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10889103 + ... + 12593450.

It is an arithmetic number, because the mean of its divisors is an integer number (712930339440).

Almost surely, 2^{20011221120222} is an apocalyptic number.

20011221120222 is an abundant number, since it is smaller than the sum of its proper divisors (25616320603938).

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

20011221120222 is a wasteful number, since it uses less digits than its factorization.

20011221120222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23482974 (or 23482968 counting only the distinct ones).

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

Adding to 20011221120222 its reverse (22202112211002), we get a palindrome (42213333331224).

The spelling of 20011221120222 in words is "twenty trillion, eleven billion, two hundred twenty-one million, one hundred twenty thousand, two hundred twenty-two".