1210200222221 has 4 divisors (see below), whose sum is σ = 1233034188732. Its totient is φ = 1187366255712.

The previous prime is 1210200222197. The next prime is 1210200222229. The reversal of 1210200222221 is 1222220020121.

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 2 ways, for example, as 579708640996 + 630491581225 = 761386^2 + 794035^2 .

It is a cyclic number.

It is not a de Polignac number, because 1210200222221 - 2²² = 1210196027917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1210200222221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210200222229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11416983176 + ... + 11416983281.

It is an arithmetic number, because the mean of its divisors is an integer number (308258547183).

Almost surely, 2^{1210200222221} is an apocalyptic number.

It is an amenable number.

1210200222221 is a deficient number, since it is larger than the sum of its proper divisors (22833966511).

1210200222221 is an equidigital number, since it uses as much as digits as its factorization.

1210200222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22833966510.

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

Adding to 1210200222221 its reverse (1222220020121), we get a palindrome (2432420242342).

The spelling of 1210200222221 in words is "one trillion, two hundred ten billion, two hundred million, two hundred twenty-two thousand, two hundred twenty-one".