121025901 has 4 divisors (see below), whose sum is σ = 161367872. Its totient is φ = 80683932.

The previous prime is 121025887. The next prime is 121025909. The reversal of 121025901 is 109520121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 121025901 - 2¹⁰ = 121024877 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 (121025909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20170981 + ... + 20170986.

It is an arithmetic number, because the mean of its divisors is an integer number (40341968).

Almost surely, 2^121025901 is an apocalyptic number.

It is an amenable number.

121025901 is a deficient number, since it is larger than the sum of its proper divisors (40341971).

121025901 is an equidigital number, since it uses as much as digits as its factorization.

121025901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40341970.

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 121025901 is about 11001.1772551850. The cubic root of 121025901 is about 494.6440334354.

The spelling of 121025901 in words is "one hundred twenty-one million, twenty-five thousand, nine hundred one".