31123321000203 has 32 divisors (see below), whose sum is σ = 41796463161600. Its totient is φ = 20600002215936.

The previous prime is 31123321000193. The next prime is 31123321000207. The reversal of 31123321000203 is 30200012332113.

It is not a de Polignac number, because 31123321000203 - 2⁶ = 31123321000139 is a prime.

It is a super-2 number, since 2×31123321000203² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31123321000203.

It is not an unprimeable number, because it can be changed into a prime (31123321000207) 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 31 ways as a sum of consecutive naturals, for example, 605262628 + ... + 605314046.

It is an arithmetic number, because the mean of its divisors is an integer number (1306139473800).

Almost surely, 2^{31123321000203} is an apocalyptic number.

31123321000203 is a deficient number, since it is larger than the sum of its proper divisors (10673142161397).

31123321000203 is a wasteful number, since it uses less digits than its factorization.

31123321000203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53691.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31123321000203 its reverse (30200012332113), we get a palindrome (61323333332316).

The spelling of 31123321000203 in words is "thirty-one trillion, one hundred twenty-three billion, three hundred twenty-one million, two hundred three", and thus it is an aban number.