221313022012 has 12 divisors (see below), whose sum is σ = 388918283040. Its totient is φ = 110193512576.

The previous prime is 221313021961. The next prime is 221313022013. The reversal of 221313022012 is 210220313122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221313022013) 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, 115748533 + ... + 115750444.

It is an arithmetic number, because the mean of its divisors is an integer number (32409856920).

Almost surely, 2^221313022012 is an apocalyptic number.

It is an amenable number.

221313022012 is a deficient number, since it is larger than the sum of its proper divisors (167605261028).

221313022012 is a wasteful number, since it uses less digits than its factorization.

221313022012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231499220 (or 231499218 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 221313022012 its reverse (210220313122), we get a palindrome (431533335134).

The spelling of 221313022012 in words is "two hundred twenty-one billion, three hundred thirteen million, twenty-two thousand, twelve".