121090 has 8 divisors (see below), whose sum is σ = 217980. Its totient is φ = 48432.

The previous prime is 121081. The next prime is 121123. The reversal of 121090 is 90121.

It can be written as a sum of positive squares in 2 ways, for example, as 110889 + 10201 = 333^2 + 101^2 .

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

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 121090.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6045 + ... + 6064.

2¹²¹⁰⁹⁰ is an apocalyptic number.

121090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121090 is a deficient number, since it is larger than the sum of its proper divisors (96890).

121090 is a wasteful number, since it uses less digits than its factorization.

121090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12116.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 121090 is about 347.9798844761. The cubic root of 121090 is about 49.4731344200.

It can be divided in two parts, 1210 and 90, that multiplied together give a square (108900 = 330²).

The spelling of 121090 in words is "one hundred twenty-one thousand, ninety".