100123011 has 6 divisors (see below), whose sum is σ = 144622140. Its totient is φ = 66748668.

The previous prime is 100122977. The next prime is 100123039. The reversal of 100123011 is 110321001.

It is not a de Polignac number, because 100123011 - 2⁹ = 100122499 is a prime.

It is a super-2 number, since 2×100123011² = 20049234663412242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 11124779 = 100123011 / (1 + 0 + 0 + 1 + 2 + 3 + 0 + 1 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 100122984 and 100123002.

It is not an unprimeable number, because it can be changed into a prime (100123811) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5562381 + ... + 5562398.

It is an arithmetic number, because the mean of its divisors is an integer number (24103690).

Almost surely, 2^100123011 is an apocalyptic number.

100123011 is a deficient number, since it is larger than the sum of its proper divisors (44499129).

100123011 is a wasteful number, since it uses less digits than its factorization.

100123011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11124785 (or 11124782 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 100123011 is about 10006.1486596992. The cubic root of 100123011 is about 464.3491275368.

Adding to 100123011 its reverse (110321001), we get a palindrome (210444012).

The spelling of 100123011 in words is "one hundred million, one hundred twenty-three thousand, eleven".