20121222011211 has 12 divisors (see below), whose sum is σ = 30001535328960. Its totient is φ = 12981433555440.

The previous prime is 20121222011203. The next prime is 20121222011239. The reversal of 20121222011211 is 11211022212102.

20121222011211 is a `hidden beast` number, since 20 + 1 + 212 + 220 + 1 + 1 + 211 = 666.

It is not a de Polignac number, because 20121222011211 - 2³ = 20121222011203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20121222016211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36059537376 + ... + 36059537933.

It is an arithmetic number, because the mean of its divisors is an integer number (2500127944080).

Almost surely, 2^{20121222011211} is an apocalyptic number.

20121222011211 is a deficient number, since it is larger than the sum of its proper divisors (9880313317749).

20121222011211 is a wasteful number, since it uses less digits than its factorization.

20121222011211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72119075346 (or 72119075343 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 20121222011211 its reverse (11211022212102), we get a palindrome (31332244223313).

The spelling of 20121222011211 in words is "twenty trillion, one hundred twenty-one billion, two hundred twenty-two million, eleven thousand, two hundred eleven".