12221122011 has 16 divisors (see below), whose sum is σ = 18645650688. Its totient is φ = 6974877600.

The previous prime is 12221121947. The next prime is 12221122037. The reversal of 12221122011 is 11022112221.

It is not a de Polignac number, because 12221122011 - 2⁶ = 12221121947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12221122811) 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, 341760 + ... + 375821.

It is an arithmetic number, because the mean of its divisors is an integer number (1165353168).

Almost surely, 2^12221122011 is an apocalyptic number.

12221122011 is a deficient number, since it is larger than the sum of its proper divisors (6424528677).

12221122011 is an equidigital number, since it uses as much as digits as its factorization.

12221122011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718402.

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

Adding to 12221122011 its reverse (11022112221), we get a palindrome (23243234232).

The spelling of 12221122011 in words is "twelve billion, two hundred twenty-one million, one hundred twenty-two thousand, eleven".