12021222111 has 8 divisors (see below), whose sum is σ = 16040852784. Its totient is φ = 8007869760.

The previous prime is 12021222047. The next prime is 12021222163. The reversal of 12021222111 is 11122212021.

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

It is not a de Polignac number, because 12021222111 - 2⁶ = 12021222047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021220111) 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, 1565110 + ... + 1572771.

It is an arithmetic number, because the mean of its divisors is an integer number (2005106598).

Almost surely, 2^12021222111 is an apocalyptic number.

12021222111 is a deficient number, since it is larger than the sum of its proper divisors (4019630673).

12021222111 is a wasteful number, since it uses less digits than its factorization.

12021222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3139161.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12021222111 its reverse (11122212021), we get a palindrome (23143434132).

The spelling of 12021222111 in words is "twelve billion, twenty-one million, two hundred twenty-two thousand, one hundred eleven".