203020123201111 has 4 divisors (see below), whose sum is σ = 203020216042000. Its totient is φ = 203020030360224.

The previous prime is 203020123201037. The next prime is 203020123201127. The reversal of 203020123201111 is 111102321020302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203020123201111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203020123201141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43059186 + ... + 47540863.

It is an arithmetic number, because the mean of its divisors is an integer number (50755054010500).

Almost surely, 2^{203020123201111} is an apocalyptic number.

203020123201111 is a deficient number, since it is larger than the sum of its proper divisors (92840889).

203020123201111 is an equidigital number, since it uses as much as digits as its factorization.

203020123201111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92840888.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 203020123201111 its reverse (111102321020302), we get a palindrome (314122444221413).

The spelling of 203020123201111 in words is "two hundred three trillion, twenty billion, one hundred twenty-three million, two hundred one thousand, one hundred eleven".