221022030312 has 48 divisors (see below), whose sum is σ = 600326475840. Its totient is φ = 73461684768.

The previous prime is 221022030289. The next prime is 221022030329. The reversal of 221022030312 is 213030220122.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4398288 + ... + 4448255.

It is an arithmetic number, because the mean of its divisors is an integer number (12506801580).

Almost surely, 2^221022030312 is an apocalyptic number.

It is an amenable number.

221022030312 is an abundant number, since it is smaller than the sum of its proper divisors (379304445528).

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

221022030312 is a wasteful number, since it uses less digits than its factorization.

221022030312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8846902 (or 8846895 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 221022030312 its reverse (213030220122), we get a palindrome (434052250434).

The spelling of 221022030312 in words is "two hundred twenty-one billion, twenty-two million, thirty thousand, three hundred twelve".