12211020221210 has 16 divisors (see below), whose sum is σ = 23272767951336. Its totient is φ = 4597089965568.

The previous prime is 12211020221189. The next prime is 12211020221237. The reversal of 12211020221210 is 1212202011221.

It can be written as a sum of positive squares in 4 ways, for example, as 12187199694289 + 23820526921 = 3491017^2 + 154339^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35914765187 + ... + 35914765526.

Almost surely, 2^{12211020221210} is an apocalyptic number.

12211020221210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12211020221210 is a deficient number, since it is larger than the sum of its proper divisors (11061747730126).

12211020221210 is a wasteful number, since it uses less digits than its factorization.

12211020221210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71829530737.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12211020221210 its reverse (1212202011221), we get a palindrome (13423222232431).

The spelling of 12211020221210 in words is "twelve trillion, two hundred eleven billion, twenty million, two hundred twenty-one thousand, two hundred ten".