21111002102 has 8 divisors (see below), whose sum is σ = 31671082296. Its totient is φ = 10553974672.

The previous prime is 21111002063. The next prime is 21111002117. The reversal of 21111002102 is 20120011112.

21111002102 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 745823 + ... + 773610.

It is an arithmetic number, because the mean of its divisors is an integer number (3958885287).

Almost surely, 2^21111002102 is an apocalyptic number.

21111002102 is a deficient number, since it is larger than the sum of its proper divisors (10560080194).

21111002102 is a wasteful number, since it uses less digits than its factorization.

21111002102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1526382.

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

Adding to 21111002102 its reverse (20120011112), we get a palindrome (41231013214).

The spelling of 21111002102 in words is "twenty-one billion, one hundred eleven million, two thousand, one hundred two".