31201221119 has 2 divisors, whose sum is σ = 31201221120. Its totient is φ = 31201221118.

The previous prime is 31201221083. The next prime is 31201221187. The reversal of 31201221119 is 91112210213.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31201221119 is a prime.

It is a super-2 number, since 2×31201221119² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31201221094 and 31201221103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31201221319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15600610559 + 15600610560.

It is an arithmetic number, because the mean of its divisors is an integer number (15600610560).

Almost surely, 2^31201221119 is an apocalyptic number.

31201221119 is a deficient number, since it is larger than the sum of its proper divisors (1).

31201221119 is an equidigital number, since it uses as much as digits as its factorization.

31201221119 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 23.

The spelling of 31201221119 in words is "thirty-one billion, two hundred one million, two hundred twenty-one thousand, one hundred nineteen".