12021212011 has 8 divisors (see below), whose sum is σ = 12724603200. Its totient is φ = 11324890440.

The previous prime is 12021212009. The next prime is 12021212029. The reversal of 12021212011 is 11021212021.

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 12021212011 - 2¹ = 12021212009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12021211982 and 12021212000.

It is not an unprimeable number, because it can be changed into a prime (12021212911) 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, 1763905 + ... + 1770706.

It is an arithmetic number, because the mean of its divisors is an integer number (1590575400).

Almost surely, 2^12021212011 is an apocalyptic number.

12021212011 is a deficient number, since it is larger than the sum of its proper divisors (703391189).

12021212011 is a wasteful number, since it uses less digits than its factorization.

12021212011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3534809.

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

Adding to 12021212011 its reverse (11021212021), we get a palindrome (23042424032).

The spelling of 12021212011 in words is "twelve billion, twenty-one million, two hundred twelve thousand, eleven".