221111121002210 has 8 divisors (see below), whose sum is σ = 398000017803996. Its totient is φ = 88444448400880.

The previous prime is 221111121002147. The next prime is 221111121002227. The reversal of 221111121002210 is 12200121111122.

It can be written as a sum of positive squares in 2 ways, for example, as 220746583996849 + 364537005361 = 14857543^2 + 603769^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11055556050101 + ... + 11055556050120.

Almost surely, 2^{221111121002210} is an apocalyptic number.

221111121002210 is a deficient number, since it is larger than the sum of its proper divisors (176888896801786).

221111121002210 is a wasteful number, since it uses less digits than its factorization.

221111121002210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22111112100228.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 221111121002210 its reverse (12200121111122), we get a palindrome (233311242113332).

The spelling of 221111121002210 in words is "two hundred twenty-one trillion, one hundred eleven billion, one hundred twenty-one million, two thousand, two hundred ten".