31120220203 has 2 divisors, whose sum is σ = 31120220204. Its totient is φ = 31120220202.

The previous prime is 31120220171. The next prime is 31120220237. The reversal of 31120220203 is 30202202113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31120220203 - 2⁵ = 31120220171 is a prime.

It is a super-2 number, since 2×31120220203² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31120220003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15560110101 + 15560110102.

It is an arithmetic number, because the mean of its divisors is an integer number (15560110102).

Almost surely, 2^31120220203 is an apocalyptic number.

31120220203 is a deficient number, since it is larger than the sum of its proper divisors (1).

31120220203 is an equidigital number, since it uses as much as digits as its factorization.

31120220203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 31120220203 its reverse (30202202113), we get a palindrome (61322422316).

The spelling of 31120220203 in words is "thirty-one billion, one hundred twenty million, two hundred twenty thousand, two hundred three".