12221021211 has 16 divisors (see below), whose sum is σ = 18624223488. Its totient is φ = 6982797600.

The previous prime is 12221021207. The next prime is 12221021213. The reversal of 12221021211 is 11212012221.

It is not a de Polignac number, because 12221021211 - 2² = 12221021207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12221021213) 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, 298521 + ... + 336981.

It is an arithmetic number, because the mean of its divisors is an integer number (1164013968).

Almost surely, 2^12221021211 is an apocalyptic number.

12221021211 is a deficient number, since it is larger than the sum of its proper divisors (6403202277).

12221021211 is a wasteful number, since it uses less digits than its factorization.

12221021211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53602.

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

Adding to 12221021211 its reverse (11212012221), we get a palindrome (23433033432).

The spelling of 12221021211 in words is "twelve billion, two hundred twenty-one million, twenty-one thousand, two hundred eleven".