1011100123203 has 8 divisors (see below), whose sum is σ = 1348138325328. Its totient is φ = 674064334944.

The previous prime is 1011100123193. The next prime is 1011100123219. The reversal of 1011100123203 is 3023210011101.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1011100123203 - 2⁶ = 1011100123139 is a prime.

It is a super-2 number, since 2×1011100123203² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1011100123273) 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 7 ways as a sum of consecutive naturals, for example, 932101 + ... + 1700297.

It is an arithmetic number, because the mean of its divisors is an integer number (168517290666).

Almost surely, 2^{1011100123203} is an apocalyptic number.

1011100123203 is a deficient number, since it is larger than the sum of its proper divisors (337038202125).

1011100123203 is an equidigital number, since it uses as much as digits as its factorization.

1011100123203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1206933.

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

Adding to 1011100123203 its reverse (3023210011101), we get a palindrome (4034310134304).

The spelling of 1011100123203 in words is "one trillion, eleven billion, one hundred million, one hundred twenty-three thousand, two hundred three".