221202221012 has 12 divisors (see below), whose sum is σ = 387128324436. Its totient is φ = 110594128320.

The previous prime is 221202220973. The next prime is 221202221047. The reversal of 221202221012 is 210122202122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 174668828356 + 46533392656 = 417934^2 + 215716^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1673939 + ... + 1801242.

It is an arithmetic number, because the mean of its divisors is an integer number (32260693703).

Almost surely, 2^221202221012 is an apocalyptic number.

It is an amenable number.

221202221012 is a deficient number, since it is larger than the sum of its proper divisors (165926103424).

221202221012 is a wasteful number, since it uses less digits than its factorization.

221202221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3491098 (or 3491096 counting only the distinct ones).

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

Adding to 221202221012 its reverse (210122202122), we get a palindrome (431324423134).

The spelling of 221202221012 in words is "two hundred twenty-one billion, two hundred two million, two hundred twenty-one thousand, twelve".