121010205423 has 8 divisors (see below), whose sum is σ = 163755104128. Its totient is φ = 79469388504.

The previous prime is 121010205397. The next prime is 121010205467. The reversal of 121010205423 is 324502010121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121010205423 - 2⁶ = 121010205359 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121010205423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121010205223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 301020211 + ... + 301020612.

It is an arithmetic number, because the mean of its divisors is an integer number (20469388016).

Almost surely, 2^121010205423 is an apocalyptic number.

121010205423 is a deficient number, since it is larger than the sum of its proper divisors (42744898705).

121010205423 is an equidigital number, since it uses as much as digits as its factorization.

121010205423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602040893.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 121010205423 its reverse (324502010121), we get a palindrome (445512215544).

The spelling of 121010205423 in words is "one hundred twenty-one billion, ten million, two hundred five thousand, four hundred twenty-three".