221020220232 has 96 divisors (see below), whose sum is σ = 685915838400. Its totient is φ = 62981960832.

The previous prime is 221020220231. The next prime is 221020220261. The reversal of 221020220232 is 232022020122.

221020220232 is a `hidden beast` number, since 2 + 210 + 2 + 0 + 220 + 232 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (221020220231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 387523 + ... + 769554.

It is an arithmetic number, because the mean of its divisors is an integer number (7144956650).

Almost surely, 2^221020220232 is an apocalyptic number.

It is an amenable number.

221020220232 is an abundant number, since it is smaller than the sum of its proper divisors (464895618168).

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

221020220232 is a wasteful number, since it uses less digits than its factorization.

221020220232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157475 (or 1157468 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 221020220232 its reverse (232022020122), we get a palindrome (453042240354).

The spelling of 221020220232 in words is "two hundred twenty-one billion, twenty million, two hundred twenty thousand, two hundred thirty-two".