21200210001 has 8 divisors (see below), whose sum is σ = 31407718560. Its totient is φ = 14133473316.

The previous prime is 21200209993. The next prime is 21200210029. The reversal of 21200210001 is 10001200212.

It is not a de Polignac number, because 21200210001 - 2³ = 21200209993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (21200210041) 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, 392596455 + ... + 392596508.

It is an arithmetic number, because the mean of its divisors is an integer number (3925964820).

Almost surely, 2^21200210001 is an apocalyptic number.

It is an amenable number.

21200210001 is a deficient number, since it is larger than the sum of its proper divisors (10207508559).

21200210001 is an equidigital number, since it uses as much as digits as its factorization.

21200210001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785192972 (or 785192966 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 21200210001 its reverse (10001200212), we get a palindrome (31201410213).

The spelling of 21200210001 in words is "twenty-one billion, two hundred million, two hundred ten thousand, one".