21101166002 has 16 divisors (see below), whose sum is σ = 36190597632. Its totient is φ = 9039064320.

The previous prime is 21101165983. The next prime is 21101166083. The reversal of 21101166002 is 20066110112.

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, 327074 + ... + 386237.

It is an arithmetic number, because the mean of its divisors is an integer number (2261912352).

Almost surely, 2^21101166002 is an apocalyptic number.

21101166002 is a deficient number, since it is larger than the sum of its proper divisors (15089431630).

21101166002 is a wasteful number, since it uses less digits than its factorization.

21101166002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715433.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 21101166002 its reverse (20066110112), we get a palindrome (41167276114).

The spelling of 21101166002 in words is "twenty-one billion, one hundred one million, one hundred sixty-six thousand, two".