21230212202 has 8 divisors (see below), whose sum is σ = 31947061476. Its totient is φ = 10581191712.

The previous prime is 21230212193. The next prime is 21230212231. The reversal of 21230212202 is 20221203212.

It can be written as a sum of positive squares in 2 ways, for example, as 14025428041 + 7204784161 = 118429^2 + 84881^2 .

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

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, 16956413 + ... + 16957664.

Almost surely, 2^21230212202 is an apocalyptic number.

21230212202 is a deficient number, since it is larger than the sum of its proper divisors (10716849274).

21230212202 is a wasteful number, since it uses less digits than its factorization.

21230212202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33914392.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21230212202 its reverse (20221203212), we get a palindrome (41451415414).

The spelling of 21230212202 in words is "twenty-one billion, two hundred thirty million, two hundred twelve thousand, two hundred two".