221501132212 has 6 divisors (see below), whose sum is σ = 387626981378. Its totient is φ = 110750566104.

The previous prime is 221501132201. The next prime is 221501132221. The reversal of 221501132212 is 212231105122.

It can be written as a sum of positive squares in only one way, i.e., 219299270436 + 2201861776 = 468294^2 + 46924^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27687641523 + ... + 27687641530.

Almost surely, 2^221501132212 is an apocalyptic number.

It is an amenable number.

221501132212 is a deficient number, since it is larger than the sum of its proper divisors (166125849166).

221501132212 is a wasteful number, since it uses less digits than its factorization.

221501132212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55375283057 (or 55375283055 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 221501132212 its reverse (212231105122), we get a palindrome (433732237334).

The spelling of 221501132212 in words is "two hundred twenty-one billion, five hundred one million, one hundred thirty-two thousand, two hundred twelve".