1212101121213 has 10 divisors (see below), whose sum is σ = 1810669576254. Its totient is φ = 808067414088.

The previous prime is 1212101121211. The next prime is 1212101121229. The reversal of 1212101121213 is 3121211012121.

It is a happy number.

1212101121213 is a `hidden beast` number, since 121 + 210 + 1 + 121 + 213 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1211996222649 + 104898564 = 1100907^2 + 10242^2 .

It is not a de Polignac number, because 1212101121213 - 2¹ = 1212101121211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212101121211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 7482105606 + ... + 7482105767.

Almost surely, 2^{1212101121213} is an apocalyptic number.

It is an amenable number.

1212101121213 is a deficient number, since it is larger than the sum of its proper divisors (598568455041).

1212101121213 is an equidigital number, since it uses as much as digits as its factorization.

1212101121213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14964211385 (or 14964211376 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 1212101121213 its reverse (3121211012121), we get a palindrome (4333312133334).

The spelling of 1212101121213 in words is "one trillion, two hundred twelve billion, one hundred one million, one hundred twenty-one thousand, two hundred thirteen".