31421030410321 has 2 divisors, whose sum is σ = 31421030410322. Its totient is φ = 31421030410320.

The previous prime is 31421030410303. The next prime is 31421030410327. The reversal of 31421030410321 is 12301403012413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28493560740096 + 2927469670225 = 5337936^2 + 1710985^2 .

It is an emirp because it is prime and its reverse (12301403012413) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31421030410321 - 2⁹ = 31421030409809 is a prime.

It is not a weakly prime, because it can be changed into another prime (31421030410327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15710515205160 + 15710515205161.

It is an arithmetic number, because the mean of its divisors is an integer number (15710515205161).

Almost surely, 2^{31421030410321} is an apocalyptic number.

It is an amenable number.

31421030410321 is a deficient number, since it is larger than the sum of its proper divisors (1).

31421030410321 is an equidigital number, since it uses as much as digits as its factorization.

31421030410321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 31421030410321 its reverse (12301403012413), we get a palindrome (43722433422734).

The spelling of 31421030410321 in words is "thirty-one trillion, four hundred twenty-one billion, thirty million, four hundred ten thousand, three hundred twenty-one".