21200213310 has 32 divisors (see below), whose sum is σ = 50895892512. Its totient is φ = 5651681280.

The previous prime is 21200213303. The next prime is 21200213329. The reversal of 21200213310 is 1331200212.

It is a super-2 number, since 2×21200213310² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21200213310.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4299 + ... + 205958.

It is an arithmetic number, because the mean of its divisors is an integer number (1590496641).

Almost surely, 2^21200213310 is an apocalyptic number.

21200213310 is an abundant number, since it is smaller than the sum of its proper divisors (29695679202).

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

21200213310 is a wasteful number, since it uses less digits than its factorization.

21200213310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213628.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21200213310 its reverse (1331200212), we get a palindrome (22531413522).

The spelling of 21200213310 in words is "twenty-one billion, two hundred million, two hundred thirteen thousand, three hundred ten".