121023121 has 4 divisors (see below), whose sum is σ = 122727744. Its totient is φ = 119318500.

The previous prime is 121023083. The next prime is 121023143. The reversal of 121023121 is 121320121.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121023121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121023821) 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, 852205 + ... + 852346.

It is an arithmetic number, because the mean of its divisors is an integer number (30681936).

Almost surely, 2^121023121 is an apocalyptic number.

It is an amenable number.

121023121 is a deficient number, since it is larger than the sum of its proper divisors (1704623).

121023121 is an equidigital number, since it uses as much as digits as its factorization.

121023121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1704622.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 121023121 is about 11001.0509043455. The cubic root of 121023121 is about 494.6402460341.

Adding to 121023121 its reverse (121320121), we get a palindrome (242343242).

The spelling of 121023121 in words is "one hundred twenty-one million, twenty-three thousand, one hundred twenty-one".