12216121007 has 2 divisors, whose sum is σ = 12216121008. Its totient is φ = 12216121006.

The previous prime is 12216120971. The next prime is 12216121061. The reversal of 12216121007 is 70012161221.

It is a weak prime.

It is an emirp because it is prime and its reverse (70012161221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12216121007 - 2⁸ = 12216120751 is a prime.

It is a super-2 number, since 2×12216121007² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12216121067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6108060503 + 6108060504.

It is an arithmetic number, because the mean of its divisors is an integer number (6108060504).

Almost surely, 2^12216121007 is an apocalyptic number.

12216121007 is a deficient number, since it is larger than the sum of its proper divisors (1).

12216121007 is an equidigital number, since it uses as much as digits as its factorization.

12216121007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 23.

Adding to 12216121007 its reverse (70012161221), we get a palindrome (82228282228).

The spelling of 12216121007 in words is "twelve billion, two hundred sixteen million, one hundred twenty-one thousand, seven".