21002202101211 has 32 divisors (see below), whose sum is σ = 29366561817600. Its totient is φ = 13333287502080.

The previous prime is 21002202101171. The next prime is 21002202101213. The reversal of 21002202101211 is 11210120220012.

It is not a de Polignac number, because 21002202101211 - 2¹⁵ = 21002202068443 is a prime.

It is a super-2 number, since 2×21002202101211² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21002202101213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4809396 + ... + 8070606.

It is an arithmetic number, because the mean of its divisors is an integer number (917705056800).

Almost surely, 2^{21002202101211} is an apocalyptic number.

21002202101211 is a deficient number, since it is larger than the sum of its proper divisors (8364359716389).

21002202101211 is a wasteful number, since it uses less digits than its factorization.

21002202101211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3262259.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21002202101211 its reverse (11210120220012), we get a palindrome (32212322321223).

The spelling of 21002202101211 in words is "twenty-one trillion, two billion, two hundred two million, one hundred one thousand, two hundred eleven".