31323042142421 has 2 divisors, whose sum is σ = 31323042142422. Its totient is φ = 31323042142420.

The previous prime is 31323042142373. The next prime is 31323042142471. The reversal of 31323042142421 is 12424124032313.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22970797641796 + 8352244500625 = 4792786^2 + 2890025^2 .

It is a cyclic number.

It is not a de Polignac number, because 31323042142421 - 2¹⁰ = 31323042141397 is a prime.

It is a super-2 number, since 2×31323042142421² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31323042142471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15661521071210 + 15661521071211.

It is an arithmetic number, because the mean of its divisors is an integer number (15661521071211).

Almost surely, 2^{31323042142421} is an apocalyptic number.

It is an amenable number.

31323042142421 is a deficient number, since it is larger than the sum of its proper divisors (1).

31323042142421 is an equidigital number, since it uses as much as digits as its factorization.

31323042142421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 31323042142421 its reverse (12424124032313), we get a palindrome (43747166174734).

It can be divided in two parts, 3132304 and 2142421, that added together give a palindrome (5274725).

The spelling of 31323042142421 in words is "thirty-one trillion, three hundred twenty-three billion, forty-two million, one hundred forty-two thousand, four hundred twenty-one".