12221001012121 has 32 divisors (see below), whose sum is σ = 13724676827136. Its totient is φ = 10787231520000.

The previous prime is 12221001012083. The next prime is 12221001012167. The reversal of 12221001012121 is 12121010012221.

It is a cyclic number.

It is not a de Polignac number, because 12221001012121 - 2¹³ = 12221001003929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12221001012095 and 12221001012104.

It is not an unprimeable number, because it can be changed into a prime (12221001012421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 124252855 + ... + 124351171.

It is an arithmetic number, because the mean of its divisors is an integer number (428896150848).

Almost surely, 2^{12221001012121} is an apocalyptic number.

12221001012121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12221001012121 is a deficient number, since it is larger than the sum of its proper divisors (1503675815015).

12221001012121 is a wasteful number, since it uses less digits than its factorization.

12221001012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100593.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12221001012121 its reverse (12121010012221), we get a palindrome (24342011024342).

The spelling of 12221001012121 in words is "twelve trillion, two hundred twenty-one billion, one million, twelve thousand, one hundred twenty-one".