21202211201 has 4 divisors (see below), whose sum is σ = 21281030100. Its totient is φ = 21123392304.

The previous prime is 21202211189. The next prime is 21202211243. The reversal of 21202211201 is 10211220212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1281711601 + 19920499600 = 35801^2 + 141140^2 .

It is a cyclic number.

It is not a de Polignac number, because 21202211201 - 2²⁶ = 21135102337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21202201201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39409046 + ... + 39409583.

It is an arithmetic number, because the mean of its divisors is an integer number (5320257525).

Almost surely, 2^21202211201 is an apocalyptic number.

It is an amenable number.

21202211201 is a deficient number, since it is larger than the sum of its proper divisors (78818899).

21202211201 is an equidigital number, since it uses as much as digits as its factorization.

21202211201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78818898.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21202211201 its reverse (10211220212), we get a palindrome (31413431413).

The spelling of 21202211201 in words is "twenty-one billion, two hundred two million, two hundred eleven thousand, two hundred one".