10321112121 has 4 divisors (see below), whose sum is σ = 13761482832. Its totient is φ = 6880741412.

The previous prime is 10321112111. The next prime is 10321112147. The reversal of 10321112121 is 12121112301.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10321112121 - 2⁵ = 10321112089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10321112121.

It is not an unprimeable number, because it can be changed into a prime (10321112111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1720185351 + ... + 1720185356.

It is an arithmetic number, because the mean of its divisors is an integer number (3440370708).

Almost surely, 2^10321112121 is an apocalyptic number.

It is an amenable number.

10321112121 is a deficient number, since it is larger than the sum of its proper divisors (3440370711).

10321112121 is an equidigital number, since it uses as much as digits as its factorization.

10321112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3440370710.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 10321112121 its reverse (12121112301), we get a palindrome (22442224422).

The spelling of 10321112121 in words is "ten billion, three hundred twenty-one million, one hundred twelve thousand, one hundred twenty-one".