101121290 has 8 divisors (see below), whose sum is σ = 182018340. Its totient is φ = 40448512.

The previous prime is 101121281. The next prime is 101121311. The reversal of 101121290 is 92121101.

It can be written as a sum of positive squares in 2 ways, for example, as 92294449 + 8826841 = 9607^2 + 2971^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5056055 + ... + 5056074.

Almost surely, 2^101121290 is an apocalyptic number.

101121290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

101121290 is a deficient number, since it is larger than the sum of its proper divisors (80897050).

101121290 is a wasteful number, since it uses less digits than its factorization.

101121290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10112136.

The product of its (nonzero) digits is 36, while the sum is 17.

The square root of 101121290 is about 10055.9082135827. The cubic root of 101121290 is about 465.8872949146.

Adding to 101121290 its reverse (92121101), we get a palindrome (193242391).

The spelling of 101121290 in words is "one hundred one million, one hundred twenty-one thousand, two hundred ninety".