20022221201220 has 144 divisors (see below), whose sum is σ = 69473992468608. Its totient is φ = 4572312606720.

The previous prime is 20022221201219. The next prime is 20022221201263. The reversal of 20022221201220 is 2210212222002.

20022221201220 is a `hidden beast` number, since 2 + 0 + 0 + 22 + 221 + 201 + 220 = 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 = 20022221201193 and 20022221201202.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5907949 + ... + 8657268.

It is an arithmetic number, because the mean of its divisors is an integer number (482458281032).

Almost surely, 2^{20022221201220} is an apocalyptic number.

20022221201220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20022221201220 is an abundant number, since it is smaller than the sum of its proper divisors (49451771267388).

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

20022221201220 is a wasteful number, since it uses less digits than its factorization.

20022221201220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14566330 (or 14566325 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 20022221201220 its reverse (2210212222002), we get a palindrome (22232433423222).

The spelling of 20022221201220 in words is "twenty trillion, twenty-two billion, two hundred twenty-one million, two hundred one thousand, two hundred twenty".