31241244421 has 2 divisors, whose sum is σ = 31241244422. Its totient is φ = 31241244420.

The previous prime is 31241244401. The next prime is 31241244427. The reversal of 31241244421 is 12444214213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25467372225 + 5773872196 = 159585^2 + 75986^2 .

It is a cyclic number.

It is not a de Polignac number, because 31241244421 - 2¹⁵ = 31241211653 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31241244421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31241244427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15620622210 + 15620622211.

It is an arithmetic number, because the mean of its divisors is an integer number (15620622211).

Almost surely, 2^31241244421 is an apocalyptic number.

It is an amenable number.

31241244421 is a deficient number, since it is larger than the sum of its proper divisors (1).

31241244421 is an equidigital number, since it uses as much as digits as its factorization.

31241244421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6144, while the sum is 28.

Adding to 31241244421 its reverse (12444214213), we get a palindrome (43685458634).

The spelling of 31241244421 in words is "thirty-one billion, two hundred forty-one million, two hundred forty-four thousand, four hundred twenty-one".