21123013301 has 16 divisors (see below), whose sum is σ = 23543520000. Its totient is φ = 18816815808.

The previous prime is 21123013283. The next prime is 21123013321. The reversal of 21123013301 is 10331032112.

It is a cyclic number.

It is not a de Polignac number, because 21123013301 - 2¹⁰ = 21123012277 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21123013301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21123013321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 849950 + ... + 874448.

It is an arithmetic number, because the mean of its divisors is an integer number (1471470000).

Almost surely, 2^21123013301 is an apocalyptic number.

It is an amenable number.

21123013301 is a deficient number, since it is larger than the sum of its proper divisors (2420506699).

21123013301 is a wasteful number, since it uses less digits than its factorization.

21123013301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26828.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21123013301 its reverse (10331032112), we get a palindrome (31454045413).

The spelling of 21123013301 in words is "twenty-one billion, one hundred twenty-three million, thirteen thousand, three hundred one".