121103021423 has 4 divisors (see below), whose sum is σ = 121122773688. Its totient is φ = 121083269160.

The previous prime is 121103021419. The next prime is 121103021437. The reversal of 121103021423 is 324120301121.

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 121103021423 - 2² = 121103021419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121103021395 and 121103021404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121103021483) 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, 9866933 + ... + 9879198.

It is an arithmetic number, because the mean of its divisors is an integer number (30280693422).

Almost surely, 2^121103021423 is an apocalyptic number.

121103021423 is a deficient number, since it is larger than the sum of its proper divisors (19752265).

121103021423 is an equidigital number, since it uses as much as digits as its factorization.

121103021423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19752264.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 121103021423 its reverse (324120301121), we get a palindrome (445223322544).

The spelling of 121103021423 in words is "one hundred twenty-one billion, one hundred three million, twenty-one thousand, four hundred twenty-three".