121212121007 has 2 divisors, whose sum is σ = 121212121008. Its totient is φ = 121212121006.

The previous prime is 121212120943. The next prime is 121212121153. The reversal of 121212121007 is 700121212121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121212121007 - 2⁶ = 121212120943 is a prime.

It is a super-2 number, since 2×121212121007² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121212121007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121212127007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60606060503 + 60606060504.

It is an arithmetic number, because the mean of its divisors is an integer number (60606060504).

Almost surely, 2^121212121007 is an apocalyptic number.

121212121007 is a deficient number, since it is larger than the sum of its proper divisors (1).

121212121007 is an equidigital number, since it uses as much as digits as its factorization.

121212121007 is an evil number, because the sum of its binary digits is even.

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

Adding to 121212121007 its reverse (700121212121), we get a palindrome (821333333128).

The spelling of 121212121007 in words is "one hundred twenty-one billion, two hundred twelve million, one hundred twenty-one thousand, seven".