12211320121 has 48 divisors (see below), whose sum is σ = 17389590400. Its totient is φ = 8320942080.

The previous prime is 12211320101. The next prime is 12211320139. The reversal of 12211320121 is 12102311221.

It is not a de Polignac number, because 12211320121 - 2⁵ = 12211320089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12211320095 and 12211320104.

It is not an unprimeable number, because it can be changed into a prime (12211320101) 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, 180025 + ... + 238393.

Almost surely, 2^12211320121 is an apocalyptic number.

12211320121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12211320121 is a deficient number, since it is larger than the sum of its proper divisors (5178270279).

12211320121 is a wasteful number, since it uses less digits than its factorization.

12211320121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58430 (or 58419 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 12211320121 its reverse (12102311221), we get a palindrome (24313631342).

The spelling of 12211320121 in words is "twelve billion, two hundred eleven million, three hundred twenty thousand, one hundred twenty-one".