21210010214 has 4 divisors (see below), whose sum is σ = 31815015324. Its totient is φ = 10605005106.

The previous prime is 21210010207. The next prime is 21210010223. The reversal of 21210010214 is 41201001212.

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 polite number, since it can be written as a sum of consecutive naturals, namely, 5302502552 + ... + 5302502555.

It is an arithmetic number, because the mean of its divisors is an integer number (7953753831).

Almost surely, 2^21210010214 is an apocalyptic number.

21210010214 is a deficient number, since it is larger than the sum of its proper divisors (10605005110).

21210010214 is a wasteful number, since it uses less digits than its factorization.

21210010214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10605005109.

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

Adding to 21210010214 its reverse (41201001212), we get a palindrome (62411011426).

The spelling of 21210010214 in words is "twenty-one billion, two hundred ten million, ten thousand, two hundred fourteen".