12021021407 has 2 divisors, whose sum is σ = 12021021408. Its totient is φ = 12021021406.

The previous prime is 12021021371. The next prime is 12021021409. The reversal of 12021021407 is 70412012021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12021021407 - 2⁸ = 12021021151 is a prime.

Together with 12021021409, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12021021409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010510703 + 6010510704.

It is an arithmetic number, because the mean of its divisors is an integer number (6010510704).

Almost surely, 2^12021021407 is an apocalyptic number.

12021021407 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021021407 is an equidigital number, since it uses as much as digits as its factorization.

12021021407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 20.

Adding to 12021021407 its reverse (70412012021), we get a palindrome (82433033428).

The spelling of 12021021407 in words is "twelve billion, twenty-one million, twenty-one thousand, four hundred seven".