21120222002012 has 12 divisors (see below), whose sum is σ = 42240444004080. Its totient is φ = 9051523715136.

The previous prime is 21120222002003. The next prime is 21120222002017. The reversal of 21120222002012 is 21020022202112.

It is a happy number.

21120222002012 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120222002017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 377146821437 + ... + 377146821492.

It is an arithmetic number, because the mean of its divisors is an integer number (3520037000340).

Almost surely, 2^{21120222002012} is an apocalyptic number.

It is an amenable number.

21120222002012 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21120222002012 is a wasteful number, since it uses less digits than its factorization.

21120222002012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754293642940 (or 754293642938 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21120222002012 its reverse (21020022202112), we get a palindrome (42140244204124).

The spelling of 21120222002012 in words is "twenty-one trillion, one hundred twenty billion, two hundred twenty-two million, two thousand, twelve".