21021200302 has 16 divisors (see below), whose sum is σ = 31770298224. Its totient is φ = 10431400000.

The previous prime is 21021200293. The next prime is 21021200309. The reversal of 21021200302 is 20300212012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021200309) 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, 66552 + ... + 215572.

It is an arithmetic number, because the mean of its divisors is an integer number (1985643639).

Almost surely, 2^21021200302 is an apocalyptic number.

21021200302 is a deficient number, since it is larger than the sum of its proper divisors (10749097922).

21021200302 is a wasteful number, since it uses less digits than its factorization.

21021200302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149555.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 21021200302 its reverse (20300212012), we get a palindrome (41321412314).

The spelling of 21021200302 in words is "twenty-one billion, twenty-one million, two hundred thousand, three hundred two".