211211010021222 has 32 divisors (see below), whose sum is σ = 474004906990560. Its totient is φ = 69706603965600.

The previous prime is 211211010021217. The next prime is 211211010021247. The reversal of 211211010021222 is 222120010112112.

211211010021222 is a `hidden beast` number, since 211 + 2 + 110 + 100 + 21 + 222 = 666.

It is a super-2 number, since 2×211211010021222² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 211211010021195 and 211211010021204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19362940093 + ... + 19362951000.

It is an arithmetic number, because the mean of its divisors is an integer number (14812653343455).

Almost surely, 2^{211211010021222} is an apocalyptic number.

211211010021222 is an abundant number, since it is smaller than the sum of its proper divisors (262793896969338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211211010021222 is a wasteful number, since it uses less digits than its factorization.

211211010021222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38725891205 (or 38725891199 counting only the distinct ones).

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

Adding to 211211010021222 its reverse (222120010112112), we get a palindrome (433331020133334).

The spelling of 211211010021222 in words is "two hundred eleven trillion, two hundred eleven billion, ten million, twenty-one thousand, two hundred twenty-two".