1212121110007 has 2 divisors, whose sum is σ = 1212121110008. Its totient is φ = 1212121110006.

The previous prime is 1212121110001. The next prime is 1212121110047. The reversal of 1212121110007 is 7000111212121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212121110007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212121110001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606060555003 + 606060555004.

It is an arithmetic number, because the mean of its divisors is an integer number (606060555004).

Almost surely, 2^{1212121110007} is an apocalyptic number.

1212121110007 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212121110007 is an equidigital number, since it uses as much as digits as its factorization.

1212121110007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 19.

Adding to 1212121110007 its reverse (7000111212121), we get a palindrome (8212232322128).

The spelling of 1212121110007 in words is "one trillion, two hundred twelve billion, one hundred twenty-one million, one hundred ten thousand, seven".