31221014213101 has 2 divisors, whose sum is σ = 31221014213102. Its totient is φ = 31221014213100.

The previous prime is 31221014213063. The next prime is 31221014213131. The reversal of 31221014213101 is 10131241012213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21731540124100 + 9489474089001 = 4661710^2 + 3080499^2 .

It is a cyclic number.

It is not a de Polignac number, because 31221014213101 - 2²³ = 31221005824493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31221014213131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15610507106550 + 15610507106551.

It is an arithmetic number, because the mean of its divisors is an integer number (15610507106551).

Almost surely, 2^{31221014213101} is an apocalyptic number.

It is an amenable number.

31221014213101 is a deficient number, since it is larger than the sum of its proper divisors (1).

31221014213101 is an equidigital number, since it uses as much as digits as its factorization.

31221014213101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 31221014213101 its reverse (10131241012213), we get a palindrome (41352255225314).

The spelling of 31221014213101 in words is "thirty-one trillion, two hundred twenty-one billion, fourteen million, two hundred thirteen thousand, one hundred one".