203011212331 has 4 divisors (see below), whose sum is σ = 213696013000. Its totient is φ = 192326411664.

The previous prime is 203011212319. The next prime is 203011212353. The reversal of 203011212331 is 133212110302.

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 203011212331 - 2¹⁵ = 203011179563 is a prime.

It is a super-2 number, since 2×203011212331² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 10684800649 = 203011212331 / (2 + 0 + 3 + 0 + 1 + 1 + 2 + 1 + 2 + 3 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203011212299 and 203011212308.

It is not an unprimeable number, because it can be changed into a prime (203011212311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5342400306 + ... + 5342400343.

It is an arithmetic number, because the mean of its divisors is an integer number (53424003250).

Almost surely, 2^203011212331 is an apocalyptic number.

203011212331 is a deficient number, since it is larger than the sum of its proper divisors (10684800669).

203011212331 is a wasteful number, since it uses less digits than its factorization.

203011212331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10684800668.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 203011212331 its reverse (133212110302), we get a palindrome (336223322633).

The spelling of 203011212331 in words is "two hundred three billion, eleven million, two hundred twelve thousand, three hundred thirty-one".