1210320342121 has 4 divisors (see below), whose sum is σ = 1320349464144. Its totient is φ = 1100291220100.

The previous prime is 1210320342083. The next prime is 1210320342191. The reversal of 1210320342121 is 1212430230121.

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 1210320342121 - 2³³ = 1201730407529 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1210320342092 and 1210320342101.

It is not an unprimeable number, because it can be changed into a prime (1210320342191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55014560995 + ... + 55014561016.

It is an arithmetic number, because the mean of its divisors is an integer number (330087366036).

Almost surely, 2^{1210320342121} is an apocalyptic number.

1210320342121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1210320342121 is a deficient number, since it is larger than the sum of its proper divisors (110029122023).

1210320342121 is a wasteful number, since it uses less digits than its factorization.

1210320342121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110029122022.

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

Adding to 1210320342121 its reverse (1212430230121), we get a palindrome (2422750572242).

The spelling of 1210320342121 in words is "one trillion, two hundred ten billion, three hundred twenty million, three hundred forty-two thousand, one hundred twenty-one".