21100211011982 has 8 divisors (see below), whose sum is σ = 32386370390616. Its totient is φ = 10304754215112.

The previous prime is 21100211011981. The next prime is 21100211011987. The reversal of 21100211011982 is 28911011200112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100211011981) 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, 122675645333 + ... + 122675645504.

It is an arithmetic number, because the mean of its divisors is an integer number (4048296298827).

Almost surely, 2^{21100211011982} is an apocalyptic number.

21100211011982 is a deficient number, since it is larger than the sum of its proper divisors (11286159378634).

21100211011982 is a wasteful number, since it uses less digits than its factorization.

21100211011982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245351290882.

The product of its (nonzero) digits is 576, while the sum is 29.

The spelling of 21100211011982 in words is "twenty-one trillion, one hundred billion, two hundred eleven million, eleven thousand, nine hundred eighty-two".