21201110109984 has 48 divisors (see below), whose sum is σ = 63603330331968. Its totient is φ = 6057460031232.

The previous prime is 21201110109943. The next prime is 21201110110007. The reversal of 21201110109984 is 48990101110212.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15774634827 + ... + 15774636170.

It is an arithmetic number, because the mean of its divisors is an integer number (1325069381916).

Almost surely, 2^{21201110109984} is an apocalyptic number.

21201110109984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21201110109984 is an abundant number, since it is smaller than the sum of its proper divisors (42402220221984).

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

21201110109984 is a wasteful number, since it uses less digits than its factorization.

21201110109984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31549271017 (or 31549271009 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 39.

The spelling of 21201110109984 in words is "twenty-one trillion, two hundred one billion, one hundred ten million, one hundred nine thousand, nine hundred eighty-four".