21000202211 has 8 divisors (see below), whose sum is σ = 21460776960. Its totient is φ = 20540200968.

The previous prime is 21000202169. The next prime is 21000202213. The reversal of 21000202211 is 11220200012.

It is a happy number.

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 21000202211 - 2²⁶ = 20933093347 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21000202192 and 21000202201.

It is not an unprimeable number, because it can be changed into a prime (21000202213) 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, 68921 + ... + 216218.

It is an arithmetic number, because the mean of its divisors is an integer number (2682597120).

Almost surely, 2^21000202211 is an apocalyptic number.

21000202211 is a deficient number, since it is larger than the sum of its proper divisors (460574749).

21000202211 is a wasteful number, since it uses less digits than its factorization.

21000202211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286753.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21000202211 its reverse (11220200012), we get a palindrome (32220402223).

The spelling of 21000202211 in words is "twenty-one billion, two hundred two thousand, two hundred eleven".