121430123121 has 4 divisors (see below), whose sum is σ = 161906830832. Its totient is φ = 80953415412.

The previous prime is 121430123119. The next prime is 121430123141. The reversal of 121430123121 is 121321034121.

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 121430123121 - 2¹ = 121430123119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121430123141) 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, 20238353851 + ... + 20238353856.

It is an arithmetic number, because the mean of its divisors is an integer number (40476707708).

Almost surely, 2^121430123121 is an apocalyptic number.

It is an amenable number.

121430123121 is a deficient number, since it is larger than the sum of its proper divisors (40476707711).

121430123121 is an equidigital number, since it uses as much as digits as its factorization.

121430123121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40476707710.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 121430123121 its reverse (121321034121), we get a palindrome (242751157242).

The spelling of 121430123121 in words is "one hundred twenty-one billion, four hundred thirty million, one hundred twenty-three thousand, one hundred twenty-one".