1221023322121 has 16 divisors (see below), whose sum is σ = 1275485460480. Its totient is φ = 1166676459520.

The previous prime is 1221023322097. The next prime is 1221023322139. The reversal of 1221023322121 is 1212233201221.

It is a cyclic number.

It is not a de Polignac number, because 1221023322121 - 2²⁵ = 1220989767689 is a prime.

It is a super-3 number, since 3×1221023322121³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1221023322092 and 1221023322101.

It is not an unprimeable number, because it can be changed into a prime (1221023325121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91709961 + ... + 91723273.

It is an arithmetic number, because the mean of its divisors is an integer number (79717841280).

Almost surely, 2^{1221023322121} is an apocalyptic number.

It is an amenable number.

1221023322121 is a deficient number, since it is larger than the sum of its proper divisors (54462138359).

1221023322121 is a wasteful number, since it uses less digits than its factorization.

1221023322121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17336.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 1221023322121 its reverse (1212233201221), we get a palindrome (2433256523342).

The spelling of 1221023322121 in words is "one trillion, two hundred twenty-one billion, twenty-three million, three hundred twenty-two thousand, one hundred twenty-one".