221322302132 has 6 divisors (see below), whose sum is σ = 387314028738. Its totient is φ = 110661151064.

The previous prime is 221322302077. The next prime is 221322302137. The reversal of 221322302132 is 231203223122.

It can be written as a sum of positive squares in only one way, i.e., 186765722896 + 34556579236 = 432164^2 + 185894^2 .

It is a super-2 number, since 2×221322302132² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221322302098 and 221322302107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221322302137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27665287763 + ... + 27665287770.

It is an arithmetic number, because the mean of its divisors is an integer number (64552338123).

Almost surely, 2^221322302132 is an apocalyptic number.

It is an amenable number.

221322302132 is a deficient number, since it is larger than the sum of its proper divisors (165991726606).

221322302132 is a wasteful number, since it uses less digits than its factorization.

221322302132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55330575537 (or 55330575535 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 221322302132 its reverse (231203223122), we get a palindrome (452525525254).

The spelling of 221322302132 in words is "two hundred twenty-one billion, three hundred twenty-two million, three hundred two thousand, one hundred thirty-two".