12021132313 has 4 divisors (see below), whose sum is σ = 12021855588. Its totient is φ = 12020409040.

The previous prime is 12021132311. The next prime is 12021132337. The reversal of 12021132313 is 31323112021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31323112021 = 1103 ⋅28398107.

It can be written as a sum of positive squares in 2 ways, for example, as 5917147929 + 6103984384 = 76923^2 + 78128^2 .

It is a cyclic number.

It is not a de Polignac number, because 12021132313 - 2¹ = 12021132311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12021132311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 336106 + ... + 370147.

It is an arithmetic number, because the mean of its divisors is an integer number (3005463897).

Almost surely, 2^12021132313 is an apocalyptic number.

It is an amenable number.

12021132313 is a deficient number, since it is larger than the sum of its proper divisors (723275).

12021132313 is an equidigital number, since it uses as much as digits as its factorization.

12021132313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723274.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 12021132313 its reverse (31323112021), we get a palindrome (43344244334).

The spelling of 12021132313 in words is "twelve billion, twenty-one million, one hundred thirty-two thousand, three hundred thirteen".