102240121 has 4 divisors (see below), whose sum is σ = 107621200. Its totient is φ = 96859044.

The previous prime is 102240113. The next prime is 102240133. The reversal of 102240121 is 121042201.

It is a happy number.

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 not a de Polignac number, because 102240121 - 2³ = 102240113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102240161) by changing a digit.

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, 2690511 + ... + 2690548.

It is an arithmetic number, because the mean of its divisors is an integer number (26905300).

Almost surely, 2^102240121 is an apocalyptic number.

It is an amenable number.

102240121 is a deficient number, since it is larger than the sum of its proper divisors (5381079).

102240121 is an equidigital number, since it uses as much as digits as its factorization.

102240121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5381078.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 102240121 is about 10111.3857111674. The cubic root of 102240121 is about 467.5992274146.

Adding to 102240121 its reverse (121042201), we get a palindrome (223282322).

The spelling of 102240121 in words is "one hundred two million, two hundred forty thousand, one hundred twenty-one".