21001100121002 has 8 divisors (see below), whose sum is σ = 31592433036096. Its totient is φ = 10470289108972.

The previous prime is 21001100120993. The next prime is 21001100121013. The reversal of 21001100121002 is 20012100110012.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15130474898 + ... + 15130476285.

It is an arithmetic number, because the mean of its divisors is an integer number (3949054129512).

Almost surely, 2^{21001100121002} is an apocalyptic number.

21001100121002 is a deficient number, since it is larger than the sum of its proper divisors (10591332915094).

21001100121002 is a wasteful number, since it uses less digits than its factorization.

21001100121002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30260951532.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21001100121002 its reverse (20012100110012), we get a palindrome (41013200231014).

The spelling of 21001100121002 in words is "twenty-one trillion, one billion, one hundred million, one hundred twenty-one thousand, two".