221233312121210 has 8 divisors (see below), whose sum is σ = 398219961818196. Its totient is φ = 88493324848480.

The previous prime is 221233312121153. The next prime is 221233312121287. The reversal of 221233312121210 is 12121213332122.

It can be written as a sum of positive squares in 2 ways, for example, as 214030492107961 + 7202820013249 = 14629781^2 + 2683807^2 .

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 221233312121210.

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, 11061665606051 + ... + 11061665606070.

Almost surely, 2^{221233312121210} is an apocalyptic number.

221233312121210 is a deficient number, since it is larger than the sum of its proper divisors (176986649696986).

221233312121210 is a wasteful number, since it uses less digits than its factorization.

221233312121210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22123331212128.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 221233312121210 its reverse (12121213332122), we get a palindrome (233354525453332).

The spelling of 221233312121210 in words is "two hundred twenty-one trillion, two hundred thirty-three billion, three hundred twelve million, one hundred twenty-one thousand, two hundred ten".