21010001021102 has 8 divisors (see below), whose sum is σ = 33368825151216. Its totient is φ = 9887059304032.

The previous prime is 21010001021083. The next prime is 21010001021111. The reversal of 21010001021102 is 20112010001012.

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

It is a congruent number.

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, 308970603218 + ... + 308970603285.

It is an arithmetic number, because the mean of its divisors is an integer number (4171103143902).

Almost surely, 2^{21010001021102} is an apocalyptic number.

21010001021102 is a deficient number, since it is larger than the sum of its proper divisors (12358824130114).

21010001021102 is a wasteful number, since it uses less digits than its factorization.

21010001021102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617941206522.

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

Adding to 21010001021102 its reverse (20112010001012), we get a palindrome (41122011022114).

The spelling of 21010001021102 in words is "twenty-one trillion, ten billion, one million, twenty-one thousand, one hundred two".