221444231212 has 12 divisors (see below), whose sum is σ = 387539157600. Its totient is φ = 110718757616.

The previous prime is 221444231201. The next prime is 221444231213. The reversal of 221444231212 is 212132444122.

It is not an unprimeable number, because it can be changed into a prime (221444231213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 688087 + ... + 957262.

It is an arithmetic number, because the mean of its divisors is an integer number (32294929800).

Almost surely, 2^221444231212 is an apocalyptic number.

It is an amenable number.

221444231212 is a deficient number, since it is larger than the sum of its proper divisors (166094926388).

221444231212 is a wasteful number, since it uses less digits than its factorization.

221444231212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1679000 (or 1678998 counting only the distinct ones).

The product of its digits is 6144, while the sum is 28.

Adding to 221444231212 its reverse (212132444122), we get a palindrome (433576675334).

The spelling of 221444231212 in words is "two hundred twenty-one billion, four hundred forty-four million, two hundred thirty-one thousand, two hundred twelve".