12222221011 has 48 divisors (see below), whose sum is σ = 16646339584. Its totient is φ = 8731800000.

The previous prime is 12222220993. The next prime is 12222221027. The reversal of 12222221011 is 11012222221.

It is a happy number.

It is not a de Polignac number, because 12222221011 - 2¹³ = 12222212819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12222227011) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1658986 + ... + 1666336.

Almost surely, 2^12222221011 is an apocalyptic number.

12222221011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12222221011 is a deficient number, since it is larger than the sum of its proper divisors (4424118573).

12222221011 is a wasteful number, since it uses less digits than its factorization.

12222221011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7544 (or 7533 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12222221011 its reverse (11012222221), we get a palindrome (23234443232).

It can be divided in two parts, 122222210 and 11, that added together give a palindrome (122222221).

The spelling of 12222221011 in words is "twelve billion, two hundred twenty-two million, two hundred twenty-one thousand, eleven".