211222022121 has 24 divisors (see below), whose sum is σ = 333586090656. Its totient is φ = 127724351040.

The previous prime is 211222022113. The next prime is 211222022147. The reversal of 211222022121 is 121220222112.

It is a happy number.

211222022121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 211222022121 - 2³ = 211222022113 is a prime.

It is a super-2 number, since 2×211222022121² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211222022094 and 211222022103.

It is not an unprimeable number, because it can be changed into a prime (211222022111) 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, 2364220 + ... + 2451933.

It is an arithmetic number, because the mean of its divisors is an integer number (13899420444).

Almost surely, 2^211222022121 is an apocalyptic number.

It is an amenable number.

211222022121 is a deficient number, since it is larger than the sum of its proper divisors (122364068535).

211222022121 is a wasteful number, since it uses less digits than its factorization.

211222022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4816613 (or 4816610 counting only the distinct ones).

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

Adding to 211222022121 its reverse (121220222112), we get a palindrome (332442244233).

Subtracting from 211222022121 its reverse (121220222112), we obtain a square (90001800009 = 300003²).

The spelling of 211222022121 in words is "two hundred eleven billion, two hundred twenty-two million, twenty-two thousand, one hundred twenty-one".