203020331111 has 16 divisors (see below), whose sum is σ = 226115635200. Its totient is φ = 181094311008.

The previous prime is 203020331083. The next prime is 203020331147. The reversal of 203020331111 is 111133020302.

It is a de Polignac number, because none of the positive numbers 2^k-203020331111 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 203020331111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203020331411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2054741 + ... + 2151278.

It is an arithmetic number, because the mean of its divisors is an integer number (14132227200).

Almost surely, 2^203020331111 is an apocalyptic number.

203020331111 is a deficient number, since it is larger than the sum of its proper divisors (23095304089).

203020331111 is a wasteful number, since it uses less digits than its factorization.

203020331111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4206158.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 203020331111 its reverse (111133020302), we get a palindrome (314153351413).

The spelling of 203020331111 in words is "two hundred three billion, twenty million, three hundred thirty-one thousand, one hundred eleven".