22121201212011 has 20 divisors (see below), whose sum is σ = 36049364939544. Its totient is φ = 13406788612800.

The previous prime is 22121201211929. The next prime is 22121201212049. The reversal of 22121201212011 is 11021210212122.

22121201212011 is a `hidden beast` number, since 221 + 2 + 120 + 121 + 201 + 1 = 666.

It is not a de Polignac number, because 22121201212011 - 2¹⁸ = 22121200949867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22121201212051) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12413692270 + ... + 12413694051.

Almost surely, 2^{22121201212011} is an apocalyptic number.

22121201212011 is a deficient number, since it is larger than the sum of its proper divisors (13928163727533).

22121201212011 is a wasteful number, since it uses less digits than its factorization.

22121201212011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24827386344 (or 24827386335 counting only the distinct ones).

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

Adding to 22121201212011 its reverse (11021210212122), we get a palindrome (33142411424133).

The spelling of 22121201212011 in words is "twenty-two trillion, one hundred twenty-one billion, two hundred one million, two hundred twelve thousand, eleven".