21201302102 has 4 divisors (see below), whose sum is σ = 31801953156. Its totient is φ = 10600651050.

The previous prime is 21201302099. The next prime is 21201302113. The reversal of 21201302102 is 20120310212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5300325524 + ... + 5300325527.

It is an arithmetic number, because the mean of its divisors is an integer number (7950488289).

Almost surely, 2^21201302102 is an apocalyptic number.

21201302102 is a deficient number, since it is larger than the sum of its proper divisors (10600651054).

21201302102 is a wasteful number, since it uses less digits than its factorization.

21201302102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10600651053.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21201302102 its reverse (20120310212), we get a palindrome (41321612314).

The spelling of 21201302102 in words is "twenty-one billion, two hundred one million, three hundred two thousand, one hundred two".