221003031221312 has 42 divisors (see below), whose sum is σ = 465867602995722. Its totient is φ = 104001426448384.

The previous prime is 221003031221311. The next prime is 221003031221321. The reversal of 221003031221312 is 213122130300122.

It can be written as a sum of positive squares in 3 ways, for example, as 46480542416896 + 174522488804416 = 6817664^2 + 13210696^2 .

It is not an unprimeable number, because it can be changed into a prime (221003031221311) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5974328153 + ... + 5974365144.

Almost surely, 2^{221003031221312} is an apocalyptic number.

It is an amenable number.

221003031221312 is an abundant number, since it is smaller than the sum of its proper divisors (244864571774410).

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

221003031221312 is a wasteful number, since it uses less digits than its factorization.

221003031221312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11948693343 (or 11948693316 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 221003031221312 its reverse (213122130300122), we get a palindrome (434125161521434).

The spelling of 221003031221312 in words is "two hundred twenty-one trillion, three billion, thirty-one million, two hundred twenty-one thousand, three hundred twelve".