1212210121007 has 2 divisors, whose sum is σ = 1212210121008. Its totient is φ = 1212210121006.

The previous prime is 1212210120997. The next prime is 1212210121009. The reversal of 1212210121007 is 7001210122121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212210121007 is a prime.

Together with 1212210121009, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1212210121007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212210121009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606105060503 + 606105060504.

It is an arithmetic number, because the mean of its divisors is an integer number (606105060504).

Almost surely, 2^{1212210121007} is an apocalyptic number.

1212210121007 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212210121007 is an equidigital number, since it uses as much as digits as its factorization.

1212210121007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 20.

Adding to 1212210121007 its reverse (7001210122121), we get a palindrome (8213420243128).

The spelling of 1212210121007 in words is "one trillion, two hundred twelve billion, two hundred ten million, one hundred twenty-one thousand, seven".