221001221122210 has 32 divisors (see below), whose sum is σ = 402501364740720. Its totient is φ = 87357362408448.

The previous prime is 221001221122207. The next prime is 221001221122247. The reversal of 221001221122210 is 12221122100122.

It can be written as a sum of positive squares in 8 ways, for example, as 28411746291289 + 192589474830921 = 5330267^2 + 13877661^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69265837 + ... + 72386176.

Almost surely, 2^{221001221122210} is an apocalyptic number.

221001221122210 is a deficient number, since it is larger than the sum of its proper divisors (181500143618510).

221001221122210 is a wasteful number, since it uses less digits than its factorization.

221001221122210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141653862.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221001221122210 its reverse (12221122100122), we get a palindrome (233222343222332).

The spelling of 221001221122210 in words is "two hundred twenty-one trillion, one billion, two hundred twenty-one million, one hundred twenty-two thousand, two hundred ten".