121423304310421 has 4 divisors (see below), whose sum is σ = 121438893393100. Its totient is φ = 121407715227744.

The previous prime is 121423304310401. The next prime is 121423304310431. The reversal of 121423304310421 is 124013403324121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42536666616196 + 78886637694225 = 6522014^2 + 8881815^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121423304310421 is a prime.

It is a super-2 number, since 2×121423304310421² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121423304310401) 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, 7794529656 + ... + 7794545233.

It is an arithmetic number, because the mean of its divisors is an integer number (30359723348275).

Almost surely, 2^{121423304310421} is an apocalyptic number.

It is an amenable number.

121423304310421 is a deficient number, since it is larger than the sum of its proper divisors (15589082679).

121423304310421 is an equidigital number, since it uses as much as digits as its factorization.

121423304310421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15589082678.

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 121423304310421 its reverse (124013403324121), we get a palindrome (245436707634542).

The spelling of 121423304310421 in words is "one hundred twenty-one trillion, four hundred twenty-three billion, three hundred four million, three hundred ten thousand, four hundred twenty-one".