21000112002218 has 64 divisors (see below), whose sum is σ = 32831834112000. Its totient is φ = 10067310638784.

The previous prime is 21000112002217. The next prime is 21000112002227. The reversal of 21000112002218 is 81220021100012.

It is a self number, because there is not a number n which added to its sum of digits gives 21000112002218.

It is not an unprimeable number, because it can be changed into a prime (21000112002217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 624113471 + ... + 624147117.

It is an arithmetic number, because the mean of its divisors is an integer number (512997408000).

Almost surely, 2^{21000112002218} is an apocalyptic number.

21000112002218 is a deficient number, since it is larger than the sum of its proper divisors (11831722109782).

21000112002218 is a wasteful number, since it uses less digits than its factorization.

21000112002218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34419.

The product of its (nonzero) digits is 128, while the sum is 20.

The spelling of 21000112002218 in words is "twenty-one trillion, one hundred twelve million, two thousand, two hundred eighteen".