12011212021 has 8 divisors (see below), whose sum is σ = 12044419200. Its totient is φ = 11978034432.

The previous prime is 12011212019. The next prime is 12011212033. The reversal of 12011212021 is 12021211021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12011212021 - 2¹ = 12011212019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12011211992 and 12011212010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011212001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 983076 + ... + 995218.

It is an arithmetic number, because the mean of its divisors is an integer number (1505552400).

Almost surely, 2^12011212021 is an apocalyptic number.

It is an amenable number.

12011212021 is a deficient number, since it is larger than the sum of its proper divisors (33207179).

12011212021 is a wasteful number, since it uses less digits than its factorization.

12011212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14795.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12011212021 its reverse (12021211021), we get a palindrome (24032423042).

The spelling of 12011212021 in words is "twelve billion, eleven million, two hundred twelve thousand, twenty-one".