211221010002222 has 96 divisors (see below), whose sum is σ = 512749555928064. Its totient is φ = 62275655736000.

The previous prime is 211221010002169. The next prime is 211221010002229. The reversal of 211221010002222 is 222200010122112.

It is a happy number.

211221010002222 is a `hidden beast` number, since 211 + 221 + 0 + 10 + 0 + 0 + 2 + 222 = 666.

It is a super-2 number, since 2×211221010002222² (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 = 211221010002195 and 211221010002204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211221010002229) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 792884347 + ... + 793150697.

It is an arithmetic number, because the mean of its divisors is an integer number (5341141207584).

Almost surely, 2^{211221010002222} is an apocalyptic number.

211221010002222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

211221010002222 is an abundant number, since it is smaller than the sum of its proper divisors (301528545925842).

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

211221010002222 is a wasteful number, since it uses less digits than its factorization.

211221010002222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374654 (or 374651 counting only the distinct ones).

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

Adding to 211221010002222 its reverse (222200010122112), we get a palindrome (433421020124334).

The spelling of 211221010002222 in words is "two hundred eleven trillion, two hundred twenty-one billion, ten million, two thousand, two hundred twenty-two".