1210123201321 has 4 divisors (see below), whose sum is σ = 1227167190144. Its totient is φ = 1193079212500.

The previous prime is 1210123201277. The next prime is 1210123201439. The reversal of 1210123201321 is 1231023210121.

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 1210123201321 - 2⁷ = 1210123201193 is a prime.

It is a super-2 number, since 2×1210123201321² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1210123201921) 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, 8521994305 + ... + 8521994446.

It is an arithmetic number, because the mean of its divisors is an integer number (306791797536).

Almost surely, 2^{1210123201321} is an apocalyptic number.

It is an amenable number.

1210123201321 is a deficient number, since it is larger than the sum of its proper divisors (17043988823).

1210123201321 is an equidigital number, since it uses as much as digits as its factorization.

1210123201321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17043988822.

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

Adding to 1210123201321 its reverse (1231023210121), we get a palindrome (2441146411442).

The spelling of 1210123201321 in words is "one trillion, two hundred ten billion, one hundred twenty-three million, two hundred one thousand, three hundred twenty-one".