21102111087354 has 64 divisors (see below), whose sum is σ = 51163819056000. Its totient is φ = 6393680853120.

The previous prime is 21102111087353. The next prime is 21102111087361. The reversal of 21102111087354 is 45378011120112.

It is a happy number.

21102111087354 is a `hidden beast` number, since 2 + 1 + 1 + 0 + 211 + 10 + 87 + 354 = 666.

It is not an unprimeable number, because it can be changed into a prime (21102111087353) 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, 1743012 + ... + 6726240.

It is an arithmetic number, because the mean of its divisors is an integer number (799434672750).

Almost surely, 2^{21102111087354} is an apocalyptic number.

21102111087354 is an abundant number, since it is smaller than the sum of its proper divisors (30061707968646).

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

21102111087354 is a wasteful number, since it uses less digits than its factorization.

21102111087354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4990380 (or 4990374 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 36.

The spelling of 21102111087354 in words is "twenty-one trillion, one hundred two billion, one hundred eleven million, eighty-seven thousand, three hundred fifty-four".