21212022101211 has 32 divisors (see below), whose sum is σ = 31558823193600. Its totient is φ = 14081233652640.

The previous prime is 21212022101183. The next prime is 21212022101219. The reversal of 21212022101211 is 11210122021212.

21212022101211 is a `hidden beast` number, since 21 + 21 + 202 + 210 + 1 + 211 = 666.

It is not a de Polignac number, because 21212022101211 - 2⁶ = 21212022101147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21212022101219) 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, 103539300 + ... + 103743966.

It is an arithmetic number, because the mean of its divisors is an integer number (986213224800).

Almost surely, 2^{21212022101211} is an apocalyptic number.

21212022101211 is a deficient number, since it is larger than the sum of its proper divisors (10346801092389).

21212022101211 is a wasteful number, since it uses less digits than its factorization.

21212022101211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220976 (or 220970 counting only the distinct ones).

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

Adding to 21212022101211 its reverse (11210122021212), we get a palindrome (32422144122423).

The spelling of 21212022101211 in words is "twenty-one trillion, two hundred twelve billion, twenty-two million, one hundred one thousand, two hundred eleven".