21112020212211 has 6 divisors (see below), whose sum is σ = 30495140306540. Its totient is φ = 14074680141468.

The previous prime is 21112020212197. The next prime is 21112020212357. The reversal of 21112020212211 is 11221202021112.

21112020212211 is a `hidden beast` number, since 211 + 12 + 0 + 20 + 212 + 211 = 666.

It is not a de Polignac number, because 21112020212211 - 2⁹ = 21112020211699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21112020212611) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1172890011781 + ... + 1172890011798.

Almost surely, 2^{21112020212211} is an apocalyptic number.

21112020212211 is a deficient number, since it is larger than the sum of its proper divisors (9383120094329).

21112020212211 is a wasteful number, since it uses less digits than its factorization.

21112020212211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2345780023585 (or 2345780023582 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21112020212211 its reverse (11221202021112), we get a palindrome (32333222233323).

The spelling of 21112020212211 in words is "twenty-one trillion, one hundred twelve billion, twenty million, two hundred twelve thousand, two hundred eleven".