31103203212211 has 4 divisors (see below), whose sum is σ = 33495757305472. Its totient is φ = 28710649118952.

The previous prime is 31103203212173. The next prime is 31103203212227. The reversal of 31103203212211 is 11221230230113.

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 31103203212211 - 2¹³ = 31103203204019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31103203213211) 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, 1196277046611 + ... + 1196277046636.

It is an arithmetic number, because the mean of its divisors is an integer number (8373939326368).

Almost surely, 2^{31103203212211} is an apocalyptic number.

31103203212211 is a deficient number, since it is larger than the sum of its proper divisors (2392554093261).

31103203212211 is a wasteful number, since it uses less digits than its factorization.

31103203212211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2392554093260.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 31103203212211 its reverse (11221230230113), we get a palindrome (42324433442324).

The spelling of 31103203212211 in words is "thirty-one trillion, one hundred three billion, two hundred three million, two hundred twelve thousand, two hundred eleven".