3031123421 has 2 divisors, whose sum is σ = 3031123422. Its totient is φ = 3031123420.

The previous prime is 3031123393. The next prime is 3031123441. The reversal of 3031123421 is 1243211303.

It is an a-pointer prime, because the next prime (3031123441) can be obtained adding 3031123421 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1936440025 + 1094683396 = 44005^2 + 33086^2 .

It is a cyclic number.

It is not a de Polignac number, because 3031123421 - 2²² = 3026929117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3031123393 and 3031123402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3031123441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1515561710 + 1515561711.

It is an arithmetic number, because the mean of its divisors is an integer number (1515561711).

Almost surely, 2^3031123421 is an apocalyptic number.

It is an amenable number.

3031123421 is a deficient number, since it is larger than the sum of its proper divisors (1).

3031123421 is an equidigital number, since it uses as much as digits as its factorization.

3031123421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 3031123421 is about 55055.6393206000. The cubic root of 3031123421 is about 1447.2199481080.

Adding to 3031123421 its reverse (1243211303), we get a palindrome (4274334724).

The spelling of 3031123421 in words is "three billion, thirty-one million, one hundred twenty-three thousand, four hundred twenty-one".