31012421203 has 4 divisors (see below), whose sum is σ = 31672260000. Its totient is φ = 30352582408.

The previous prime is 31012421201. The next prime is 31012421221. The reversal of 31012421203 is 30212421013.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30212421013 = 73 ⋅413868781.

It is a cyclic number.

It is not a de Polignac number, because 31012421203 - 2¹ = 31012421201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31012421201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 329919328 + ... + 329919421.

It is an arithmetic number, because the mean of its divisors is an integer number (7918065000).

Almost surely, 2^31012421203 is an apocalyptic number.

31012421203 is a deficient number, since it is larger than the sum of its proper divisors (659838797).

31012421203 is an equidigital number, since it uses as much as digits as its factorization.

31012421203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659838796.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 31012421203 its reverse (30212421013), we get a palindrome (61224842216).

The spelling of 31012421203 in words is "thirty-one billion, twelve million, four hundred twenty-one thousand, two hundred three".