21210222211120 has 20 divisors (see below), whose sum is σ = 49313766641040. Its totient is φ = 8484088884416.

The previous prime is 21210222211117. The next prime is 21210222211153. The reversal of 21210222211120 is 2111222201212.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132563888740 + ... + 132563888899.

It is an arithmetic number, because the mean of its divisors is an integer number (2465688332052).

Almost surely, 2^{21210222211120} is an apocalyptic number.

21210222211120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21210222211120 is an abundant number, since it is smaller than the sum of its proper divisors (28103544429920).

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

21210222211120 is a wasteful number, since it uses less digits than its factorization.

21210222211120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265127777652 (or 265127777646 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21210222211120 its reverse (2111222201212), we get a palindrome (23321444412332).

The spelling of 21210222211120 in words is "twenty-one trillion, two hundred ten billion, two hundred twenty-two million, two hundred eleven thousand, one hundred twenty".