121320423 has 72 divisors (see below), whose sum is σ = 221090688. Its totient is φ = 66162096.

The previous prime is 121320403. The next prime is 121320481. The reversal of 121320423 is 324023121.

It is not a de Polignac number, because 121320423 - 2⁶ = 121320359 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121320396 and 121320405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121320403) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 273640 + ... + 274082.

It is an arithmetic number, because the mean of its divisors is an integer number (3070704).

Almost surely, 2^121320423 is an apocalyptic number.

121320423 is a deficient number, since it is larger than the sum of its proper divisors (99770265).

121320423 is an equidigital number, since it uses as much as digits as its factorization.

121320423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495 (or 476 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 121320423 is about 11014.5550522933. Note that the first 3 decimals coincide. The cubic root of 121320423 is about 495.0449545949.

Adding to 121320423 its reverse (324023121), we get a palindrome (445343544).

The spelling of 121320423 in words is "one hundred twenty-one million, three hundred twenty thousand, four hundred twenty-three".