31112220203 has 4 divisors (see below), whose sum is σ = 31321027200. Its totient is φ = 30903413208.

The previous prime is 31112220173. The next prime is 31112220277. The reversal of 31112220203 is 30202221113.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31112220203 - 2¹⁴ = 31112203819 is a prime.

It is a super-2 number, since 2×31112220203² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31112220703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104403275 + ... + 104403572.

It is an arithmetic number, because the mean of its divisors is an integer number (7830256800).

Almost surely, 2^31112220203 is an apocalyptic number.

31112220203 is a deficient number, since it is larger than the sum of its proper divisors (208806997).

31112220203 is a wasteful number, since it uses less digits than its factorization.

31112220203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208806996.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31112220203 its reverse (30202221113), we get a palindrome (61314441316).

The spelling of 31112220203 in words is "thirty-one billion, one hundred twelve million, two hundred twenty thousand, two hundred three".