121320323210021 has 16 divisors (see below), whose sum is σ = 132383329102080. Its totient is φ = 110509559529600.

The previous prime is 121320323210003. The next prime is 121320323210071. The reversal of 121320323210021 is 120012323023121.

It is a cyclic number.

It is not a de Polignac number, because 121320323210021 - 2¹⁴ = 121320323193637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121320323210071) 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, 103650305 + ... + 104814246.

It is an arithmetic number, because the mean of its divisors is an integer number (8273958068880).

Almost surely, 2^{121320323210021} is an apocalyptic number.

It is an amenable number.

121320323210021 is a deficient number, since it is larger than the sum of its proper divisors (11063005892059).

121320323210021 is a wasteful number, since it uses less digits than its factorization.

121320323210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208465156.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 121320323210021 its reverse (120012323023121), we get a palindrome (241332646233142).

The spelling of 121320323210021 in words is "one hundred twenty-one trillion, three hundred twenty billion, three hundred twenty-three million, two hundred ten thousand, twenty-one".