212211011022021 has 24 divisors (see below), whose sum is σ = 334533080650080. Its totient is φ = 128558898424800.

The previous prime is 212211011022019. The next prime is 212211011022041. The reversal of 212211011022021 is 120220110112212.

212211011022021 is a `hidden beast` number, since 212 + 211 + 0 + 1 + 1 + 0 + 220 + 21 = 666.

It is not a de Polignac number, because 212211011022021 - 2¹ = 212211011022019 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 212211011021985 and 212211011022003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212211011022041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 448391695 + ... + 448864716.

It is an arithmetic number, because the mean of its divisors is an integer number (13938878360420).

Almost surely, 2^{212211011022021} is an apocalyptic number.

It is an amenable number.

212211011022021 is a deficient number, since it is larger than the sum of its proper divisors (122322069628059).

212211011022021 is a wasteful number, since it uses less digits than its factorization.

212211011022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 897258817 (or 897258814 counting only the distinct ones).

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

Adding to 212211011022021 its reverse (120220110112212), we get a palindrome (332431121134233).

It can be divided in two parts, 2122110 and 11022021, that added together give a palindrome (13144131).

The spelling of 212211011022021 in words is "two hundred twelve trillion, two hundred eleven billion, eleven million, twenty-two thousand, twenty-one".