21211023202 has 8 divisors (see below), whose sum is σ = 32493482496. Its totient is φ = 10379862372.

The previous prime is 21211023193. The next prime is 21211023259. The reversal of 21211023202 is 20232011212.

It is a happy number.

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, 112824498 + ... + 112824685.

It is an arithmetic number, because the mean of its divisors is an integer number (4061685312).

Almost surely, 2^21211023202 is an apocalyptic number.

21211023202 is a deficient number, since it is larger than the sum of its proper divisors (11282459294).

21211023202 is a wasteful number, since it uses less digits than its factorization.

21211023202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225649232.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21211023202 its reverse (20232011212), we get a palindrome (41443034414).

The spelling of 21211023202 in words is "twenty-one billion, two hundred eleven million, twenty-three thousand, two hundred two".