21002101214 has 4 divisors (see below), whose sum is σ = 31503151824. Its totient is φ = 10501050606.

The previous prime is 21002101181. The next prime is 21002101249. The reversal of 21002101214 is 41210120012.

It is a happy number.

21002101214 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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, 5250525302 + ... + 5250525305.

It is an arithmetic number, because the mean of its divisors is an integer number (7875787956).

Almost surely, 2^21002101214 is an apocalyptic number.

21002101214 is a deficient number, since it is larger than the sum of its proper divisors (10501050610).

21002101214 is a wasteful number, since it uses less digits than its factorization.

21002101214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10501050609.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21002101214 its reverse (41210120012), we get a palindrome (62212221226).

The spelling of 21002101214 in words is "twenty-one billion, two million, one hundred one thousand, two hundred fourteen".