31203123201211 has 32 divisors (see below), whose sum is σ = 36730818432000. Its totient is φ = 26245836183168.

The previous prime is 31203123201193. The next prime is 31203123201221. The reversal of 31203123201211 is 11210232130213.

It is a cyclic number.

It is not a de Polignac number, because 31203123201211 - 2²³ = 31203114812603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31203123201221) 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 in 31 ways as a sum of consecutive naturals, for example, 6397791 + ... + 10165528.

It is an arithmetic number, because the mean of its divisors is an integer number (1147838076000).

Almost surely, 2^{31203123201211} is an apocalyptic number.

31203123201211 is a deficient number, since it is larger than the sum of its proper divisors (5527695230789).

31203123201211 is a wasteful number, since it uses less digits than its factorization.

31203123201211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16563643.

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

Adding to 31203123201211 its reverse (11210232130213), we get a palindrome (42413355331424).

The spelling of 31203123201211 in words is "thirty-one trillion, two hundred three billion, one hundred twenty-three million, two hundred one thousand, two hundred eleven".