221313122132 has 18 divisors (see below), whose sum is σ = 400194468954. Its totient is φ = 107086992720.

The previous prime is 221313122089. The next prime is 221313122179. The reversal of 221313122132 is 231221313122.

It can be written as a sum of positive squares in only one way, i.e., 185835139396 + 35477982736 = 431086^2 + 188356^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221313122098 and 221313122107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28782983 + ... + 28790670.

It is an arithmetic number, because the mean of its divisors is an integer number (22233026053).

Almost surely, 2^221313122132 is an apocalyptic number.

It is an amenable number.

221313122132 is a deficient number, since it is larger than the sum of its proper divisors (178881346822).

221313122132 is a wasteful number, since it uses less digits than its factorization.

221313122132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57573719 (or 57573686 counting only the distinct ones).

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

Adding to 221313122132 its reverse (231221313122), we get a palindrome (452534435254).

The spelling of 221313122132 in words is "two hundred twenty-one billion, three hundred thirteen million, one hundred twenty-two thousand, one hundred thirty-two".