1212122120211 has 24 divisors (see below), whose sum is σ = 1815966791184. Its totient is φ = 778456785600.

The previous prime is 1212122120207. The next prime is 1212122120327. The reversal of 1212122120211 is 1120212212121.

1212122120211 is a `hidden beast` number, since 1 + 212 + 1 + 221 + 20 + 211 = 666.

It is not a de Polignac number, because 1212122120211 - 2² = 1212122120207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212122120711) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17986201 + ... + 18053466.

It is an arithmetic number, because the mean of its divisors is an integer number (75665282966).

Almost surely, 2^{1212122120211} is an apocalyptic number.

1212122120211 is a deficient number, since it is larger than the sum of its proper divisors (603844670973).

1212122120211 is a wasteful number, since it uses less digits than its factorization.

1212122120211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36039811 (or 36039808 counting only the distinct ones).

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

Adding to 1212122120211 its reverse (1120212212121), we get a palindrome (2332334332332).

The spelling of 1212122120211 in words is "one trillion, two hundred twelve billion, one hundred twenty-two million, one hundred twenty thousand, two hundred eleven".