312201112012121 has 4 divisors (see below), whose sum is σ = 312201159406032. Its totient is φ = 312201064618212.

The previous prime is 312201112012079. The next prime is 312201112012123. The reversal of 312201112012121 is 121210211102213.

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 312201112012121 - 2³⁸ = 311926234105177 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312201112012093 and 312201112012102.

It is not an unprimeable number, because it can be changed into a prime (312201112012123) 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, 11837495 + ... + 27650108.

It is an arithmetic number, because the mean of its divisors is an integer number (78050289851508).

Almost surely, 2^{312201112012121} is an apocalyptic number.

It is an amenable number.

312201112012121 is a deficient number, since it is larger than the sum of its proper divisors (47393911).

312201112012121 is an equidigital number, since it uses as much as digits as its factorization.

312201112012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47393910.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 312201112012121 its reverse (121210211102213), we get a palindrome (433411323114334).

The spelling of 312201112012121 in words is "three hundred twelve trillion, two hundred one billion, one hundred twelve million, twelve thousand, one hundred twenty-one".