201312010121 has 4 divisors (see below), whose sum is σ = 201312924672. Its totient is φ = 201311095572.

The previous prime is 201312010111. The next prime is 201312010127. The reversal of 201312010121 is 121010213102.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 121010213102 = 2 ⋅60505106551.

It is a cyclic number.

It is not a de Polignac number, because 201312010121 - 2⁶ = 201312010057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201312010096 and 201312010105.

It is not an unprimeable number, because it can be changed into a prime (201312010127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96260 + ... + 641786.

It is an arithmetic number, because the mean of its divisors is an integer number (50328231168).

Almost surely, 2^201312010121 is an apocalyptic number.

It is an amenable number.

201312010121 is a deficient number, since it is larger than the sum of its proper divisors (914551).

201312010121 is an equidigital number, since it uses as much as digits as its factorization.

201312010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914550.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 201312010121 its reverse (121010213102), we get a palindrome (322322223223).

The spelling of 201312010121 in words is "two hundred one billion, three hundred twelve million, ten thousand, one hundred twenty-one".