21133002210 has 32 divisors (see below), whose sum is σ = 50816220480. Its totient is φ = 5624687808.

The previous prime is 21133002197. The next prime is 21133002211. The reversal of 21133002210 is 1220033112.

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 21133002210.

It is not an unprimeable number, because it can be changed into a prime (21133002211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 657765 + ... + 689144.

It is an arithmetic number, because the mean of its divisors is an integer number (1588006890).

Almost surely, 2^21133002210 is an apocalyptic number.

21133002210 is an abundant number, since it is smaller than the sum of its proper divisors (29683218270).

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

21133002210 is a wasteful number, since it uses less digits than its factorization.

21133002210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347442.

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

Adding to 21133002210 its reverse (1220033112), we get a palindrome (22353035322).

The spelling of 21133002210 in words is "twenty-one billion, one hundred thirty-three million, two thousand, two hundred ten".