10312123421 has 4 divisors (see below), whose sum is σ = 10314535392. Its totient is φ = 10309711452.

The previous prime is 10312123417. The next prime is 10312123429. The reversal of 10312123421 is 12432121301.

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 10312123421 - 2² = 10312123417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10312123393 and 10312123402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10312123429) 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, 1199561 + ... + 1208126.

It is an arithmetic number, because the mean of its divisors is an integer number (2578633848).

Almost surely, 2^10312123421 is an apocalyptic number.

It is an amenable number.

10312123421 is a deficient number, since it is larger than the sum of its proper divisors (2411971).

10312123421 is an equidigital number, since it uses as much as digits as its factorization.

10312123421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2411970.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 10312123421 its reverse (12432121301), we get a palindrome (22744244722).

The spelling of 10312123421 in words is "ten billion, three hundred twelve million, one hundred twenty-three thousand, four hundred twenty-one".