21211033302 has 16 divisors (see below), whose sum is σ = 47135629680. Its totient is φ = 7070344416.

The previous prime is 21211033279. The next prime is 21211033303. The reversal of 21211033302 is 20333011212.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211033303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196398403 + ... + 196398510.

It is an arithmetic number, because the mean of its divisors is an integer number (2945976855).

Almost surely, 2^21211033302 is an apocalyptic number.

21211033302 is an abundant number, since it is smaller than the sum of its proper divisors (25924596378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21211033302 is a wasteful number, since it uses less digits than its factorization.

21211033302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392796924 (or 392796918 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21211033302 its reverse (20333011212), we get a palindrome (41544044514).

The spelling of 21211033302 in words is "twenty-one billion, two hundred eleven million, thirty-three thousand, three hundred two".