221132212020 has 72 divisors (see below), whose sum is σ = 671399304576. Its totient is φ = 58913065152.

The previous prime is 221132212019. The next prime is 221132212033. The reversal of 221132212020 is 20212231122.

221132212020 is a `hidden beast` number, since 221 + 1 + 322 + 120 + 2 + 0 = 666.

221132212020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 = 221132211984 and 221132212002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 386512 + ... + 769191.

Almost surely, 2^221132212020 is an apocalyptic number.

221132212020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221132212020 is an abundant number, since it is smaller than the sum of its proper divisors (450267092556).

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

221132212020 is a wasteful number, since it uses less digits than its factorization.

221132212020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1156781 (or 1156776 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 221132212020 its reverse (20212231122), we get a palindrome (241344443142).

The spelling of 221132212020 in words is "two hundred twenty-one billion, one hundred thirty-two million, two hundred twelve thousand, twenty".