21002100110102 has 8 divisors (see below), whose sum is σ = 31503248515200. Its totient is φ = 10501017271704.

The previous prime is 21002100110083. The next prime is 21002100110111. The reversal of 21002100110102 is 20101100120012.

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

It is a super-4 number, since 4×21002100110102⁴ (a number of 54 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15582902 + ... + 16876937.

It is an arithmetic number, because the mean of its divisors is an integer number (3937906064400).

Almost surely, 2^{21002100110102} is an apocalyptic number.

21002100110102 is a deficient number, since it is larger than the sum of its proper divisors (10501148405098).

21002100110102 is a wasteful number, since it uses less digits than its factorization.

21002100110102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32783350.

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

Adding to 21002100110102 its reverse (20101100120012), we get a palindrome (41103200230114).

The spelling of 21002100110102 in words is "twenty-one trillion, two billion, one hundred million, one hundred ten thousand, one hundred two".