21123101301 has 8 divisors (see below), whose sum is σ = 28166813184. Its totient is φ = 14080728480.

The previous prime is 21123101257. The next prime is 21123101309. The reversal of 21123101301 is 10310132112.

It is a happy number.

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

It is not a de Polignac number, because 21123101301 - 2¹⁰ = 21123100277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21123101309) 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, 297360 + ... + 361481.

It is an arithmetic number, because the mean of its divisors is an integer number (3520851648).

Almost surely, 2^21123101301 is an apocalyptic number.

It is an amenable number.

21123101301 is a deficient number, since it is larger than the sum of its proper divisors (7043711883).

21123101301 is a wasteful number, since it uses less digits than its factorization.

21123101301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669531.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21123101301 its reverse (10310132112), we get a palindrome (31433233413).

The spelling of 21123101301 in words is "twenty-one billion, one hundred twenty-three million, one hundred one thousand, three hundred one".