21342020201 has 8 divisors (see below), whose sum is σ = 22598925480. Its totient is φ = 20085280768.

The previous prime is 21342020197. The next prime is 21342020213. The reversal of 21342020201 is 10202024312.

It can be written as a sum of positive squares in 4 ways, for example, as 3223514176 + 18118506025 = 56776^2 + 134605^2 .

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

It is not a de Polignac number, because 21342020201 - 2² = 21342020197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

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 21342020201.

It is not an unprimeable number, because it can be changed into a prime (21342020251) 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, 307445 + ... + 370413.

It is an arithmetic number, because the mean of its divisors is an integer number (2824865685).

Almost surely, 2^21342020201 is an apocalyptic number.

It is an amenable number.

21342020201 is a deficient number, since it is larger than the sum of its proper divisors (1256905279).

21342020201 is a wasteful number, since it uses less digits than its factorization.

21342020201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82923.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21342020201 its reverse (10202024312), we get a palindrome (31544044513).

The spelling of 21342020201 in words is "twenty-one billion, three hundred forty-two million, twenty thousand, two hundred one".