10121211221211 has 12 divisors (see below), whose sum is σ = 14619634035240. Its totient is φ = 6747424894080.

The previous prime is 10121211221207. The next prime is 10121211221243. The reversal of 10121211221211 is 11212211212101.

It is a happy number.

10121211221211 is a `hidden beast` number, since 1 + 0 + 1 + 21 + 211 + 221 + 211 = 666.

It is not a de Polignac number, because 10121211221211 - 2² = 10121211221207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10121211222211) 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, 2780521 + ... + 5289018.

It is an arithmetic number, because the mean of its divisors is an integer number (1218302836270).

Almost surely, 2^{10121211221211} is an apocalyptic number.

10121211221211 is a deficient number, since it is larger than the sum of its proper divisors (4498422814029).

10121211221211 is a wasteful number, since it uses less digits than its factorization.

10121211221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8208906 (or 8208903 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 10121211221211 its reverse (11212211212101), we get a palindrome (21333422433312).

The spelling of 10121211221211 in words is "ten trillion, one hundred twenty-one billion, two hundred eleven million, two hundred twenty-one thousand, two hundred eleven".