12221021011 has 8 divisors (see below), whose sum is σ = 12396862800. Its totient is φ = 12045860352.

The previous prime is 12221020969. The next prime is 12221021053. The reversal of 12221021011 is 11012012221.

It is an interprime number because it is at equal distance from previous prime (12221020969) and next prime (12221021053).

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

It is a cyclic number.

It is not a de Polignac number, because 12221021011 - 2⁹ = 12221020499 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12221020982 and 12221021000.

It is not an unprimeable number, because it can be changed into a prime (12221061011) 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, 134086 + ... + 205963.

It is an arithmetic number, because the mean of its divisors is an integer number (1549607850).

Almost surely, 2^12221021011 is an apocalyptic number.

12221021011 is a deficient number, since it is larger than the sum of its proper divisors (175841789).

12221021011 is an equidigital number, since it uses as much as digits as its factorization.

12221021011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340565.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12221021011 its reverse (11012012221), we get a palindrome (23233033232).

The spelling of 12221021011 in words is "twelve billion, two hundred twenty-one million, twenty-one thousand, eleven".