12021233213 has 16 divisors (see below), whose sum is σ = 13404673152. Its totient is φ = 10687560000.

The previous prime is 12021233179. The next prime is 12021233221. The reversal of 12021233213 is 31233212021.

It is a cyclic number.

It is not a de Polignac number, because 12021233213 - 2⁸ = 12021232957 is a prime.

It is a super-2 number, since 2×12021233213² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021233243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148163 + ... + 214463.

It is an arithmetic number, because the mean of its divisors is an integer number (837792072).

Almost surely, 2^12021233213 is an apocalyptic number.

It is an amenable number.

12021233213 is a deficient number, since it is larger than the sum of its proper divisors (1383439939).

12021233213 is a wasteful number, since it uses less digits than its factorization.

12021233213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66676.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 12021233213 its reverse (31233212021), we get a palindrome (43254445234).

The spelling of 12021233213 in words is "twelve billion, twenty-one million, two hundred thirty-three thousand, two hundred thirteen".