31220012203 has 8 divisors (see below), whose sum is σ = 32874181520. Its totient is φ = 29566944000.

The previous prime is 31220012141. The next prime is 31220012249. The reversal of 31220012203 is 30221002213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31220012203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31220010203) 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 7 ways as a sum of consecutive naturals, for example, 216750 + ... + 330787.

It is an arithmetic number, because the mean of its divisors is an integer number (4109272690).

Almost surely, 2^31220012203 is an apocalyptic number.

31220012203 is a deficient number, since it is larger than the sum of its proper divisors (1654169317).

31220012203 is a wasteful number, since it uses less digits than its factorization.

31220012203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550557.

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

Adding to 31220012203 its reverse (30221002213), we get a palindrome (61441014416).

The spelling of 31220012203 in words is "thirty-one billion, two hundred twenty million, twelve thousand, two hundred three".