21121120002222 has 64 divisors (see below), whose sum is σ = 49461426385920. Its totient is φ = 6667594164000.

The previous prime is 21121120002179. The next prime is 21121120002239. The reversal of 21121120002222 is 22220002112112.

It is a happy number.

21121120002222 is a `hidden beast` number, since 211 + 211 + 20 + 0 + 0 + 2 + 222 = 666.

It is a super-2 number, since 2×21121120002222² (a number of 27 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 = 21121120002195 and 21121120002204.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 84061354 + ... + 84312237.

It is an arithmetic number, because the mean of its divisors is an integer number (772834787280).

Almost surely, 2^{21121120002222} is an apocalyptic number.

21121120002222 is an abundant number, since it is smaller than the sum of its proper divisors (28340306383698).

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

21121120002222 is a wasteful number, since it uses less digits than its factorization.

21121120002222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168373726 (or 168373720 counting only the distinct ones).

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

Adding to 21121120002222 its reverse (22220002112112), we get a palindrome (43341122114334).

The spelling of 21121120002222 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred twenty million, two thousand, two hundred twenty-two".