21303010232123 has 16 divisors (see below), whose sum is σ = 21614406660000. Its totient is φ = 20992950727680.

The previous prime is 21303010232107. The next prime is 21303010232129. The reversal of 21303010232123 is 32123201030312.

It is a cyclic number.

It is not a de Polignac number, because 21303010232123 - 2⁴ = 21303010232107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21303010232129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105083723 + ... + 105286251.

It is an arithmetic number, because the mean of its divisors is an integer number (1350900416250).

Almost surely, 2^{21303010232123} is an apocalyptic number.

21303010232123 is a deficient number, since it is larger than the sum of its proper divisors (311396427877).

21303010232123 is a wasteful number, since it uses less digits than its factorization.

21303010232123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205822.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21303010232123 its reverse (32123201030312), we get a palindrome (53426211262435).

The spelling of 21303010232123 in words is "twenty-one trillion, three hundred three billion, ten million, two hundred thirty-two thousand, one hundred twenty-three".