21035505102 has 8 divisors (see below), whose sum is σ = 42071010216. Its totient is φ = 7011835032.

The previous prime is 21035505089. The next prime is 21035505109. The reversal of 21035505102 is 20150553012.

It is a happy number.

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

21035505102 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21035505109) 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, 1752958753 + ... + 1752958764.

It is an arithmetic number, because the mean of its divisors is an integer number (5258876277).

Almost surely, 2^21035505102 is an apocalyptic number.

21035505102 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21035505102 is a wasteful number, since it uses less digits than its factorization.

21035505102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3505917522.

The product of its (nonzero) digits is 1500, while the sum is 24.

The spelling of 21035505102 in words is "twenty-one billion, thirty-five million, five hundred five thousand, one hundred two".