312221313011 has 2 divisors, whose sum is σ = 312221313012. Its totient is φ = 312221313010.

The previous prime is 312221313007. The next prime is 312221313071. The reversal of 312221313011 is 110313122213.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 312221313011 - 2² = 312221313007 is a prime.

It is a super-2 number, since 2×312221313011² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (312221313071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156110656505 + 156110656506.

It is an arithmetic number, because the mean of its divisors is an integer number (156110656506).

Almost surely, 2^312221313011 is an apocalyptic number.

312221313011 is a deficient number, since it is larger than the sum of its proper divisors (1).

312221313011 is an equidigital number, since it uses as much as digits as its factorization.

312221313011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 312221313011 its reverse (110313122213), we get a palindrome (422534435224).

The spelling of 312221313011 in words is "three hundred twelve billion, two hundred twenty-one million, three hundred thirteen thousand, eleven".