12221002011 has 8 divisors (see below), whose sum is σ = 16339070464. Its totient is φ = 8125134120.

The previous prime is 12221001997. The next prime is 12221002021. The reversal of 12221002011 is 11020012221.

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

It is a de Polignac number, because none of the positive numbers 2^k-12221002011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12221002021) 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, 5548855 + ... + 5551056.

It is an arithmetic number, because the mean of its divisors is an integer number (2042383808).

Almost surely, 2^12221002011 is an apocalyptic number.

12221002011 is a deficient number, since it is larger than the sum of its proper divisors (4118068453).

12221002011 is a wasteful number, since it uses less digits than its factorization.

12221002011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11100281.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12221002011 its reverse (11020012221), we get a palindrome (23241014232).

The spelling of 12221002011 in words is "twelve billion, two hundred twenty-one million, two thousand, eleven".