21241002102 has 32 divisors (see below), whose sum is σ = 43585123680. Its totient is φ = 6897012480.

The previous prime is 21241002071. The next prime is 21241002109. The reversal of 21241002102 is 20120014212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21241002109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94524 + ... + 226752.

It is an arithmetic number, because the mean of its divisors is an integer number (1362035115).

Almost surely, 2^21241002102 is an apocalyptic number.

21241002102 is an abundant number, since it is smaller than the sum of its proper divisors (22344121578).

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

21241002102 is a wasteful number, since it uses less digits than its factorization.

21241002102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132928.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21241002102 its reverse (20120014212), we get a palindrome (41361016314).

The spelling of 21241002102 in words is "twenty-one billion, two hundred forty-one million, two thousand, one hundred two".