21212021302 has 8 divisors (see below), whose sum is σ = 32175538200. Its totient is φ = 10486841904.

The previous prime is 21212021279. The next prime is 21212021317. The reversal of 21212021302 is 20312021212.

It is a happy number.

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

It is a congruent 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, 59584152 + ... + 59584507.

It is an arithmetic number, because the mean of its divisors is an integer number (4021942275).

Almost surely, 2^21212021302 is an apocalyptic number.

21212021302 is a deficient number, since it is larger than the sum of its proper divisors (10963516898).

21212021302 is a wasteful number, since it uses less digits than its factorization.

21212021302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119168750.

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

Adding to 21212021302 its reverse (20312021212), we get a palindrome (41524042514).

The spelling of 21212021302 in words is "twenty-one billion, two hundred twelve million, twenty-one thousand, three hundred two".