220001121212220 has 36 divisors (see below), whose sum is σ = 667336734344280. Its totient is φ = 58666965656544.

The previous prime is 220001121212183. The next prime is 220001121212227. The reversal of 220001121212220 is 22212121100022.

It is a happy number.

220001121212220 is a `hidden beast` number, since 2 + 200 + 0 + 11 + 21 + 212 + 220 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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 = 220001121212193 and 220001121212202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220001121212227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 611114225410 + ... + 611114225769.

Almost surely, 2^{220001121212220} is an apocalyptic number.

220001121212220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220001121212220 is an abundant number, since it is smaller than the sum of its proper divisors (447335613132060).

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

220001121212220 is a wasteful number, since it uses less digits than its factorization.

220001121212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1222228451194 (or 1222228451189 counting only the distinct ones).

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

Adding to 220001121212220 its reverse (22212121100022), we get a palindrome (242213242312242).

The spelling of 220001121212220 in words is "two hundred twenty trillion, one billion, one hundred twenty-one million, two hundred twelve thousand, two hundred twenty".