12021221351 has 2 divisors, whose sum is σ = 12021221352. Its totient is φ = 12021221350.

The previous prime is 12021221299. The next prime is 12021221369. The reversal of 12021221351 is 15312212021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12021221351 - 2²⁶ = 11954112487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12021223351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010610675 + 6010610676.

It is an arithmetic number, because the mean of its divisors is an integer number (6010610676).

Almost surely, 2^12021221351 is an apocalyptic number.

12021221351 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021221351 is an equidigital number, since it uses as much as digits as its factorization.

12021221351 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 12021221351 its reverse (15312212021), we get a palindrome (27333433372).

The spelling of 12021221351 in words is "twelve billion, twenty-one million, two hundred twenty-one thousand, three hundred fifty-one".