221210655122 has 8 divisors (see below), whose sum is σ = 332092269372. Its totient is φ = 110513232000.

The previous prime is 221210655037. The next prime is 221210655137. The reversal of 221210655122 is 221556012122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 219154123321 + 2056531801 = 468139^2 + 45349^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46044779 + ... + 46049582.

Almost surely, 2^221210655122 is an apocalyptic number.

221210655122 is a deficient number, since it is larger than the sum of its proper divisors (110881614250).

221210655122 is a wasteful number, since it uses less digits than its factorization.

221210655122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92095564.

The product of its (nonzero) digits is 4800, while the sum is 29.

Adding to 221210655122 its reverse (221556012122), we get a palindrome (442766667244).

The spelling of 221210655122 in words is "two hundred twenty-one billion, two hundred ten million, six hundred fifty-five thousand, one hundred twenty-two".