21202212011 has 8 divisors (see below), whose sum is σ = 21942699120. Its totient is φ = 20462350048.

The previous prime is 21202212007. The next prime is 21202212019. The reversal of 21202212011 is 11021220212.

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 21202212011 - 2² = 21202212007 is a prime.

It is a super-3 number, since 3×21202212011³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21202212019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86741 + ... + 223446.

It is an arithmetic number, because the mean of its divisors is an integer number (2742837390).

Almost surely, 2^21202212011 is an apocalyptic number.

21202212011 is a deficient number, since it is larger than the sum of its proper divisors (740487109).

21202212011 is a wasteful number, since it uses less digits than its factorization.

21202212011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312573.

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

Adding to 21202212011 its reverse (11021220212), we get a palindrome (32223432223).

The spelling of 21202212011 in words is "twenty-one billion, two hundred two million, two hundred twelve thousand, eleven".