221032020 has 48 divisors (see below), whose sum is σ = 675154368. Its totient is φ = 53583360.

The previous prime is 221032003. The next prime is 221032037. The reversal of 221032020 is 20230122.

221032020 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (221032003) and next prime (221032037).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 221031987 and 221032005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166789 + ... + 168108.

It is an arithmetic number, because the mean of its divisors is an integer number (14065716).

Almost surely, 2^221032020 is an apocalyptic number.

221032020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221032020 is an abundant number, since it is smaller than the sum of its proper divisors (454122348).

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

221032020 is a wasteful number, since it uses less digits than its factorization.

221032020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334920 (or 334918 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 221032020 is about 14867.1456574556. The cubic root of 221032020 is about 604.6235574542.

Adding to 221032020 its reverse (20230122), we get a palindrome (241262142).

The spelling of 221032020 in words is "two hundred twenty-one million, thirty-two thousand, twenty".