31212030169 has 2 divisors, whose sum is σ = 31212030170. Its totient is φ = 31212030168.

The previous prime is 31212030167. The next prime is 31212030251. The reversal of 31212030169 is 96103021213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19545438025 + 11666592144 = 139805^2 + 108012^2 .

It is an emirp because it is prime and its reverse (96103021213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31212030169 - 2¹ = 31212030167 is a prime.

It is a super-2 number, since 2×31212030169² (a number of 22 digits) contains 22 as substring.

Together with 31212030167, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (31212030167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15606015084 + 15606015085.

It is an arithmetic number, because the mean of its divisors is an integer number (15606015085).

Almost surely, 2^31212030169 is an apocalyptic number.

It is an amenable number.

31212030169 is a deficient number, since it is larger than the sum of its proper divisors (1).

31212030169 is an equidigital number, since it uses as much as digits as its factorization.

31212030169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 28.

The spelling of 31212030169 in words is "thirty-one billion, two hundred twelve million, thirty thousand, one hundred sixty-nine".