203111110023 has 16 divisors (see below), whose sum is σ = 272318877696. Its totient is φ = 134655824160.

The previous prime is 203111109977. The next prime is 203111110051. The reversal of 203111110023 is 320011111302.

It is a happy number.

It is not a de Polignac number, because 203111110023 - 2¹⁰ = 203111108999 is a prime.

It is a super-2 number, since 2×203111110023² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 203111109984 and 203111110011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203111110063) 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, 1809486 + ... + 1918452.

It is an arithmetic number, because the mean of its divisors is an integer number (17019929856).

Almost surely, 2^203111110023 is an apocalyptic number.

203111110023 is a deficient number, since it is larger than the sum of its proper divisors (69207767673).

203111110023 is a wasteful number, since it uses less digits than its factorization.

203111110023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112414.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 203111110023 its reverse (320011111302), we get a palindrome (523122221325).

The spelling of 203111110023 in words is "two hundred three billion, one hundred eleven million, one hundred ten thousand, twenty-three".