121310212321 has 4 divisors (see below), whose sum is σ = 121317095700. Its totient is φ = 121303328944.

The previous prime is 121310212313. The next prime is 121310212333. The reversal of 121310212321 is 123212013121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 70161414400 + 51148797921 = 264880^2 + 226161^2 .

It is a cyclic number.

It is not a de Polignac number, because 121310212321 - 2³ = 121310212313 is a prime.

It is a super-2 number, since 2×121310212321² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121310212381) 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, 3415186 + ... + 3450523.

It is an arithmetic number, because the mean of its divisors is an integer number (30329273925).

Almost surely, 2^121310212321 is an apocalyptic number.

It is an amenable number.

121310212321 is a deficient number, since it is larger than the sum of its proper divisors (6883379).

121310212321 is an equidigital number, since it uses as much as digits as its factorization.

121310212321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6883378.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 121310212321 its reverse (123212013121), we get a palindrome (244522225442).

The spelling of 121310212321 in words is "one hundred twenty-one billion, three hundred ten million, two hundred twelve thousand, three hundred twenty-one".