203112011101 has 4 divisors (see below), whose sum is σ = 203187045952. Its totient is φ = 203036976252.

The previous prime is 203112011099. The next prime is 203112011147. The reversal of 203112011101 is 101110211302.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 101110211302 = 2 ⋅50555105651.

It is a cyclic number.

It is not a de Polignac number, because 203112011101 - 2¹ = 203112011099 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 (203112911101) 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, 37513365 + ... + 37518778.

It is an arithmetic number, because the mean of its divisors is an integer number (50796761488).

Almost surely, 2^203112011101 is an apocalyptic number.

It is an amenable number.

203112011101 is a deficient number, since it is larger than the sum of its proper divisors (75034851).

203112011101 is an equidigital number, since it uses as much as digits as its factorization.

203112011101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75034850.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 203112011101 its reverse (101110211302), we get a palindrome (304222222403).

The spelling of 203112011101 in words is "two hundred three billion, one hundred twelve million, eleven thousand, one hundred one".