221020001112 has 32 divisors (see below), whose sum is σ = 585052945200. Its totient is φ = 69339608064.

The previous prime is 221020001093. The next prime is 221020001113. The reversal of 221020001112 is 211100020122.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221020001113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270857437 + ... + 270858252.

Almost surely, 2^221020001112 is an apocalyptic number.

It is an amenable number.

221020001112 is an abundant number, since it is smaller than the sum of its proper divisors (364032944088).

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

221020001112 is a wasteful number, since it uses less digits than its factorization.

221020001112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541715715 (or 541715711 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 221020001112 its reverse (211100020122), we get a palindrome (432120021234).

The spelling of 221020001112 in words is "two hundred twenty-one billion, twenty million, one thousand, one hundred twelve".