12221011121 has 8 divisors (see below), whose sum is σ = 13344178464. Its totient is φ = 11099871520.

The previous prime is 12221011087. The next prime is 12221011139. The reversal of 12221011121 is 12111012221.

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 12221011121 - 2⁶ = 12221011057 is a prime.

It is a super-2 number, since 2×12221011121² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12221011096 and 12221011105.

It is not an unprimeable number, because it can be changed into a prime (12221011151) 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, 494315 + ... + 518448.

It is an arithmetic number, because the mean of its divisors is an integer number (1668022308).

Almost surely, 2^12221011121 is an apocalyptic number.

12221011121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12221011121 is a deficient number, since it is larger than the sum of its proper divisors (1123167343).

12221011121 is a wasteful number, since it uses less digits than its factorization.

12221011121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1013871.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12221011121 its reverse (12111012221), we get a palindrome (24332023342).

It can be divided in two parts, 122210 and 11121, that added together give a palindrome (133331).

The spelling of 12221011121 in words is "twelve billion, two hundred twenty-one million, eleven thousand, one hundred twenty-one".