21101002102 has 32 divisors (see below), whose sum is σ = 34974374400. Its totient is φ = 9503322048.

The previous prime is 21101002099. The next prime is 21101002129. The reversal of 21101002102 is 20120010112.

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 15 ways as a sum of consecutive naturals, for example, 73674 + ... + 218242.

It is an arithmetic number, because the mean of its divisors is an integer number (1092949200).

Almost surely, 2^21101002102 is an apocalyptic number.

21101002102 is a deficient number, since it is larger than the sum of its proper divisors (13873372298).

21101002102 is a wasteful number, since it uses less digits than its factorization.

21101002102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144780.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21101002102 its reverse (20120010112), we get a palindrome (41221012214).

The spelling of 21101002102 in words is "twenty-one billion, one hundred one million, two thousand, one hundred two".