221121052 has 6 divisors (see below), whose sum is σ = 386961848. Its totient is φ = 110560524.

The previous prime is 221121013. The next prime is 221121053. The reversal of 221121052 is 250121122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221121053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27640128 + ... + 27640135.

Almost surely, 2^221121052 is an apocalyptic number.

It is an amenable number.

221121052 is a deficient number, since it is larger than the sum of its proper divisors (165840796).

221121052 is a wasteful number, since it uses less digits than its factorization.

221121052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55280267 (or 55280265 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 221121052 is about 14870.1396092976. The cubic root of 221121052 is about 604.7047276220.

Adding to 221121052 its reverse (250121122), we get a palindrome (471242174).

The spelling of 221121052 in words is "two hundred twenty-one million, one hundred twenty-one thousand, fifty-two".