21012021301 has 8 divisors (see below), whose sum is σ = 22721385600. Its totient is φ = 19355252928.

The previous prime is 21012021293. The next prime is 21012021313. The reversal of 21012021301 is 10312021012.

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 21012021301 - 2³ = 21012021293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012021001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13148151 + ... + 13149748.

It is an arithmetic number, because the mean of its divisors is an integer number (2840173200).

Almost surely, 2^21012021301 is an apocalyptic number.

It is an amenable number.

21012021301 is a deficient number, since it is larger than the sum of its proper divisors (1709364299).

21012021301 is a wasteful number, since it uses less digits than its factorization.

21012021301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26297963.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21012021301 its reverse (10312021012), we get a palindrome (31324042313).

The spelling of 21012021301 in words is "twenty-one billion, twelve million, twenty-one thousand, three hundred one".