121321623 has 8 divisors (see below), whose sum is σ = 162074736. Its totient is φ = 80724800.

The previous prime is 121321621. The next prime is 121321649. The reversal of 121321623 is 326123121.

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

It is a cyclic number.

It is not a de Polignac number, because 121321623 - 2¹ = 121321621 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121321623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121321621) 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, 37248 + ... + 40373.

It is an arithmetic number, because the mean of its divisors is an integer number (20259342).

Almost surely, 2^121321623 is an apocalyptic number.

121321623 is a deficient number, since it is larger than the sum of its proper divisors (40753113).

121321623 is an equidigital number, since it uses as much as digits as its factorization.

121321623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78145.

The product of its digits is 432, while the sum is 21.

The square root of 121321623 is about 11014.6095255347. The cubic root of 121321623 is about 495.0465867795.

Adding to 121321623 its reverse (326123121), we get a palindrome (447444744).

The spelling of 121321623 in words is "one hundred twenty-one million, three hundred twenty-one thousand, six hundred twenty-three".