21201421301 has 16 divisors (see below), whose sum is σ = 22779792000. Its totient is φ = 19670683968.

The previous prime is 21201421277. The next prime is 21201421303. The reversal of 21201421301 is 10312410212.

It is a cyclic number.

It is not a de Polignac number, because 21201421301 - 2¹⁰ = 21201420277 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21201421301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201421303) 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, 542000 + ... + 579798.

It is an arithmetic number, because the mean of its divisors is an integer number (1423737000).

Almost surely, 2^21201421301 is an apocalyptic number.

It is an amenable number.

21201421301 is a deficient number, since it is larger than the sum of its proper divisors (1578370699).

21201421301 is a wasteful number, since it uses less digits than its factorization.

21201421301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38428.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21201421301 its reverse (10312410212), we get a palindrome (31513831513).

The spelling of 21201421301 in words is "twenty-one billion, two hundred one million, four hundred twenty-one thousand, three hundred one".