221112011212020 has 144 divisors (see below), whose sum is σ = 687078104993280. Its totient is φ = 57523989542400.

The previous prime is 221112011212013. The next prime is 221112011212123. The reversal of 221112011212020 is 20212110211122.

221112011212020 is a `hidden beast` number, since 221 + 1 + 120 + 1 + 121 + 202 + 0 = 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 = 221112011211984 and 221112011212002.

It is a congruent number.

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, 436044825 + ... + 436551615.

It is an arithmetic number, because the mean of its divisors is an integer number (4771375729120).

Almost surely, 2^{221112011212020} is an apocalyptic number.

221112011212020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221112011212020 is an abundant number, since it is smaller than the sum of its proper divisors (465966093781260).

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

221112011212020 is a wasteful number, since it uses less digits than its factorization.

221112011212020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565966 (or 565961 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 221112011212020 its reverse (20212110211122), we get a palindrome (241324121423142).

The spelling of 221112011212020 in words is "two hundred twenty-one trillion, one hundred twelve billion, eleven million, two hundred twelve thousand, twenty".