12021201331 has 2 divisors, whose sum is σ = 12021201332. Its totient is φ = 12021201330.

The previous prime is 12021201319. The next prime is 12021201377. The reversal of 12021201331 is 13310212021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12021201331 - 2⁹ = 12021200819 is a prime.

It is a super-2 number, since 2×12021201331² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12021201301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010600665 + 6010600666.

It is an arithmetic number, because the mean of its divisors is an integer number (6010600666).

Almost surely, 2^12021201331 is an apocalyptic number.

12021201331 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021201331 is an equidigital number, since it uses as much as digits as its factorization.

12021201331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 12021201331 its reverse (13310212021), we get a palindrome (25331413352).

The spelling of 12021201331 in words is "twelve billion, twenty-one million, two hundred one thousand, three hundred thirty-one".