312121423 has 8 divisors (see below), whose sum is σ = 324730880. Its totient is φ = 299670840.

The previous prime is 312121373. The next prime is 312121429. The reversal of 312121423 is 324121213.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 312121423 - 2⁹ = 312120911 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 312121423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312121429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35703 + ... + 43576.

It is an arithmetic number, because the mean of its divisors is an integer number (40591360).

Almost surely, 2^312121423 is an apocalyptic number.

312121423 is a deficient number, since it is larger than the sum of its proper divisors (12609457).

312121423 is a wasteful number, since it uses less digits than its factorization.

312121423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79437.

The product of its digits is 288, while the sum is 19.

The square root of 312121423 is about 17666.9585101681. The cubic root of 312121423 is about 678.3302624621.

Adding to 312121423 its reverse (324121213), we get a palindrome (636242636).

The spelling of 312121423 in words is "three hundred twelve million, one hundred twenty-one thousand, four hundred twenty-three".