121023142423 has 4 divisors (see below), whose sum is σ = 121025745648. Its totient is φ = 121020539200.

The previous prime is 121023142381. The next prime is 121023142441. The reversal of 121023142423 is 324241320121.

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

It is a cyclic number.

It is not a de Polignac number, because 121023142423 - 2¹³ = 121023134231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121053142423) 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, 1230586 + ... + 1325287.

It is an arithmetic number, because the mean of its divisors is an integer number (30256436412).

Almost surely, 2^121023142423 is an apocalyptic number.

121023142423 is a deficient number, since it is larger than the sum of its proper divisors (2603225).

121023142423 is an equidigital number, since it uses as much as digits as its factorization.

121023142423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2603224.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 121023142423 its reverse (324241320121), we get a palindrome (445264462544).

The spelling of 121023142423 in words is "one hundred twenty-one billion, twenty-three million, one hundred forty-two thousand, four hundred twenty-three".