21202102211 has 8 divisors (see below), whose sum is σ = 23173455744. Its totient is φ = 19311212160.

The previous prime is 21202102189. The next prime is 21202102219. The reversal of 21202102211 is 11220120212.

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 21202102211 - 2³⁰ = 20128360387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21202102219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20115320 + ... + 20116373.

It is an arithmetic number, because the mean of its divisors is an integer number (2896681968).

Almost surely, 2^21202102211 is an apocalyptic number.

21202102211 is a deficient number, since it is larger than the sum of its proper divisors (1971353533).

21202102211 is a wasteful number, since it uses less digits than its factorization.

21202102211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40231741.

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

Adding to 21202102211 its reverse (11220120212), we get a palindrome (32422222423).

The spelling of 21202102211 in words is "twenty-one billion, two hundred two million, one hundred two thousand, two hundred eleven".