21120210002112 has 112 divisors (see below), whose sum is σ = 60181272758880. Its totient is φ = 6498287198208.

The previous prime is 21120210002077. The next prime is 21120210002113. The reversal of 21120210002112 is 21120001202112.

It is a junction number, because it is equal to n+sod(n) for n = 21120210002091 and 21120210002100.

It is not an unprimeable number, because it can be changed into a prime (21120210002113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75011548 + ... + 75292580.

It is an arithmetic number, because the mean of its divisors is an integer number (537332792490).

Almost surely, 2^{21120210002112} is an apocalyptic number.

It is an amenable number.

21120210002112 is an abundant number, since it is smaller than the sum of its proper divisors (39061062756768).

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

21120210002112 is a wasteful number, since it uses less digits than its factorization.

21120210002112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311170 (or 311160 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21120210002112 its reverse (21120001202112), we get a palindrome (42240211204224).

The spelling of 21120210002112 in words is "twenty-one trillion, one hundred twenty billion, two hundred ten million, two thousand, one hundred twelve".