12021232011 has 4 divisors (see below), whose sum is σ = 16028309352. Its totient is φ = 8014154672.

The previous prime is 12021232009. The next prime is 12021232033. The reversal of 12021232011 is 11023212021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12021232011 - 2¹ = 12021232009 is a prime.

It is a super-2 number, since 2×12021232011² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12021232001) 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, 2003538666 + ... + 2003538671.

It is an arithmetic number, because the mean of its divisors is an integer number (4007077338).

Almost surely, 2^12021232011 is an apocalyptic number.

12021232011 is a deficient number, since it is larger than the sum of its proper divisors (4007077341).

12021232011 is an equidigital number, since it uses as much as digits as its factorization.

12021232011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4007077340.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 12021232011 its reverse (11023212021), we get a palindrome (23044444032).

The spelling of 12021232011 in words is "twelve billion, twenty-one million, two hundred thirty-two thousand, eleven".