221312202 has 16 divisors (see below), whose sum is σ = 448688640. Its totient is φ = 72760032.

The previous prime is 221312191. The next prime is 221312243. The reversal of 221312202 is 202213122.

It is a happy number.

221312202 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252202 + ... + 253077.

It is an arithmetic number, because the mean of its divisors is an integer number (28043040).

Almost surely, 2^221312202 is an apocalyptic number.

221312202 is an abundant number, since it is smaller than the sum of its proper divisors (227376438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221312202 is a wasteful number, since it uses less digits than its factorization.

221312202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505357.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 221312202 is about 14876.5655310626. The cubic root of 221312202 is about 604.8789248415.

Adding to 221312202 its reverse (202213122), we get a palindrome (423525324).

The spelling of 221312202 in words is "two hundred twenty-one million, three hundred twelve thousand, two hundred two".