21023123301 has 24 divisors (see below), whose sum is σ = 30625395840. Its totient is φ = 13896542016.

The previous prime is 21023123291. The next prime is 21023123309. The reversal of 21023123301 is 10332132012.

21023123301 is a `hidden beast` number, since 21 + 0 + 2 + 312 + 330 + 1 = 666.

It is not a de Polignac number, because 21023123301 - 2⁹ = 21023122789 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023123309) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 480210 + ... + 522156.

It is an arithmetic number, because the mean of its divisors is an integer number (1276058160).

Almost surely, 2^21023123301 is an apocalyptic number.

It is an amenable number.

21023123301 is a deficient number, since it is larger than the sum of its proper divisors (9602272539).

21023123301 is a wasteful number, since it uses less digits than its factorization.

21023123301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42425 (or 42422 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21023123301 its reverse (10332132012), we get a palindrome (31355255313).

The spelling of 21023123301 in words is "twenty-one billion, twenty-three million, one hundred twenty-three thousand, three hundred one".