221220200210 has 32 divisors (see below), whose sum is σ = 409321427760. Its totient is φ = 86020088832.

The previous prime is 221220200171. The next prime is 221220200233. The reversal of 221220200210 is 12002022122.

It can be written as a sum of positive squares in 8 ways, for example, as 127606842841 + 93613357369 = 357221^2 + 305963^2 .

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, 152942 + ... + 682518.

Almost surely, 2^221220200210 is an apocalyptic number.

221220200210 is a deficient number, since it is larger than the sum of its proper divisors (188101227550).

221220200210 is a wasteful number, since it uses less digits than its factorization.

221220200210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530750.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 221220200210 its reverse (12002022122), we get a palindrome (233222222332).

The spelling of 221220200210 in words is "two hundred twenty-one billion, two hundred twenty million, two hundred thousand, two hundred ten".