21212011302 has 8 divisors (see below), whose sum is σ = 42424022616. Its totient is φ = 7070670432.

The previous prime is 21212011291. The next prime is 21212011309. The reversal of 21212011302 is 20311021212.

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

21212011302 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21212011309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1767667603 + ... + 1767667614.

It is an arithmetic number, because the mean of its divisors is an integer number (5303002827).

Almost surely, 2^21212011302 is an apocalyptic number.

21212011302 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.

21212011302 is a wasteful number, since it uses less digits than its factorization.

21212011302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3535335222.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21212011302 its reverse (20311021212), we get a palindrome (41523032514).

The spelling of 21212011302 in words is "twenty-one billion, two hundred twelve million, eleven thousand, three hundred two".