121901 has 4 divisors (see below), whose sum is σ = 131292. Its totient is φ = 112512.

The previous prime is 121889. The next prime is 121909. The reversal of 121901 is 109121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15625 + 106276 = 125^2 + 326^2 .

It is a cyclic number.

It is not a de Polignac number, because 121901 - 2¹⁰ = 120877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121909) 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, 4676 + ... + 4701.

It is an arithmetic number, because the mean of its divisors is an integer number (32823).

2¹²¹⁹⁰¹ is an apocalyptic number.

It is an amenable number.

121901 is a deficient number, since it is larger than the sum of its proper divisors (9391).

121901 is an equidigital number, since it uses as much as digits as its factorization.

121901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9390.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 121901 is about 349.1432370819. The cubic root of 121901 is about 49.5833374919.

The spelling of 121901 in words is "one hundred twenty-one thousand, nine hundred one".