221112202202 has 4 divisors (see below), whose sum is σ = 331668303306. Its totient is φ = 110556101100.

The previous prime is 221112202177. The next prime is 221112202211. The reversal of 221112202202 is 202202211122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 216626015761 + 4486186441 = 465431^2 + 66979^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55278050549 + ... + 55278050552.

Almost surely, 2^221112202202 is an apocalyptic number.

221112202202 is a deficient number, since it is larger than the sum of its proper divisors (110556101104).

221112202202 is a wasteful number, since it uses less digits than its factorization.

221112202202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110556101103.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 221112202202 its reverse (202202211122), we get a palindrome (423314413324).

The spelling of 221112202202 in words is "two hundred twenty-one billion, one hundred twelve million, two hundred two thousand, two hundred two".