21102101102 has 8 divisors (see below), whose sum is σ = 31723650000. Its totient is φ = 10527551104.

The previous prime is 21102101101. The next prime is 21102101117. The reversal of 21102101102 is 20110120112.

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

It is a super-2 number, since 2×21102101102² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102101101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11748602 + ... + 11750397.

It is an arithmetic number, because the mean of its divisors is an integer number (3965456250).

Almost surely, 2^21102101102 is an apocalyptic number.

21102101102 is a deficient number, since it is larger than the sum of its proper divisors (10621548898).

21102101102 is a wasteful number, since it uses less digits than its factorization.

21102101102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23499450.

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

Adding to 21102101102 its reverse (20110120112), we get a palindrome (41212221214).

The spelling of 21102101102 in words is "twenty-one billion, one hundred two million, one hundred one thousand, one hundred two".