101115890 has 8 divisors (see below), whose sum is σ = 182008620. Its totient is φ = 40446352.

The previous prime is 101115871. The next prime is 101115899. The reversal of 101115890 is 98511101.

It can be written as a sum of positive squares in 2 ways, for example, as 81126049 + 19989841 = 9007^2 + 4471^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (101115899) 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, 5055785 + ... + 5055804.

Almost surely, 2^101115890 is an apocalyptic number.

101115890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

101115890 is a deficient number, since it is larger than the sum of its proper divisors (80892730).

101115890 is a wasteful number, since it uses less digits than its factorization.

101115890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10111596.

The product of its (nonzero) digits is 360, while the sum is 26.

The square root of 101115890 is about 10055.6397111273. The cubic root of 101115890 is about 465.8790017841.

Adding to 101115890 its reverse (98511101), we get a palindrome (199626991).

The spelling of 101115890 in words is "one hundred one million, one hundred fifteen thousand, eight hundred ninety".