20121002222211 has 24 divisors (see below), whose sum is σ = 31907769616944. Its totient is φ = 12116874519360.

The previous prime is 20121002222177. The next prime is 20121002222231. The reversal of 20121002222211 is 11222220012102.

It is a happy number.

20121002222211 is a `hidden beast` number, since 20 + 1 + 210 + 0 + 2 + 222 + 211 = 666.

It is not a de Polignac number, because 20121002222211 - 2⁶ = 20121002222147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20121002222231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 647253396 + ... + 647284481.

It is an arithmetic number, because the mean of its divisors is an integer number (1329490400706).

Almost surely, 2^{20121002222211} is an apocalyptic number.

20121002222211 is a deficient number, since it is larger than the sum of its proper divisors (11786767394733).

20121002222211 is a wasteful number, since it uses less digits than its factorization.

20121002222211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1294538051 (or 1294538048 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20121002222211 its reverse (11222220012102), we get a palindrome (31343222234313).

The spelling of 20121002222211 in words is "twenty trillion, one hundred twenty-one billion, two million, two hundred twenty-two thousand, two hundred eleven".