21210023202 has 8 divisors (see below), whose sum is σ = 42420046416. Its totient is φ = 7070007732.

The previous prime is 21210023143. The next prime is 21210023251. The reversal of 21210023202 is 20232001212.

It is a happy number.

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

21210023202 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1767501928 + ... + 1767501939.

It is an arithmetic number, because the mean of its divisors is an integer number (5302505802).

Almost surely, 2^21210023202 is an apocalyptic number.

21210023202 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.

21210023202 is a wasteful number, since it uses less digits than its factorization.

21210023202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3535003872.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21210023202 its reverse (20232001212), we get a palindrome (41442024414).

The spelling of 21210023202 in words is "twenty-one billion, two hundred ten million, twenty-three thousand, two hundred two".