21002222111120 has 40 divisors (see below), whose sum is σ = 49304245713216. Its totient is φ = 8319326813568.

The previous prime is 21002222111119. The next prime is 21002222111203. The reversal of 21002222111120 is 2111122220012.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-4 number, since 4×21002222111120⁴ (a number of 54 digits) contains 4444 as substring.

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 7 ways as a sum of consecutive naturals, for example, 1274398442 + ... + 1274414921.

Almost surely, 2^{21002222111120} is an apocalyptic number.

21002222111120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21002222111120 is an abundant number, since it is smaller than the sum of its proper divisors (28302023602096).

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

21002222111120 is a wasteful number, since it uses less digits than its factorization.

21002222111120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2548813479 (or 2548813473 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21002222111120 its reverse (2111122220012), we get a palindrome (23113344331132).

The spelling of 21002222111120 in words is "twenty-one trillion, two billion, two hundred twenty-two million, one hundred eleven thousand, one hundred twenty".