21020212202211 has 24 divisors (see below), whose sum is σ = 31186182278160. Its totient is φ = 13633400972736.

The previous prime is 21020212202153. The next prime is 21020212202219. The reversal of 21020212202211 is 11220221202012.

It is a happy number.

21020212202211 is a `hidden beast` number, since 21 + 0 + 20 + 212 + 202 + 211 = 666.

It is not a de Polignac number, because 21020212202211 - 2¹⁸ = 21020211940067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21020212202219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 339741 + ... + 6492753.

It is an arithmetic number, because the mean of its divisors is an integer number (1299424261590).

Almost surely, 2^{21020212202211} is an apocalyptic number.

21020212202211 is a deficient number, since it is larger than the sum of its proper divisors (10165970075949).

21020212202211 is a wasteful number, since it uses less digits than its factorization.

21020212202211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6163315 (or 6163312 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21020212202211 its reverse (11220221202012), we get a palindrome (32240433404223).

The spelling of 21020212202211 in words is "twenty-one trillion, twenty billion, two hundred twelve million, two hundred two thousand, two hundred eleven".