21233120210 has 16 divisors (see below), whose sum is σ = 38315894616. Its totient is φ = 8471852928.

The previous prime is 21233120137. The next prime is 21233120239. The reversal of 21233120210 is 1202133212.

It can be written as a sum of positive squares in 4 ways, for example, as 13007174401 + 8225945809 = 114049^2 + 90697^2 .

It is a super-3 number, since 3×21233120210³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2670227 + ... + 2678166.

Almost surely, 2^21233120210 is an apocalyptic number.

21233120210 is a deficient number, since it is larger than the sum of its proper divisors (17082774406).

21233120210 is a wasteful number, since it uses less digits than its factorization.

21233120210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5348797.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21233120210 its reverse (1202133212), we get a palindrome (22435253422).

The spelling of 21233120210 in words is "twenty-one billion, two hundred thirty-three million, one hundred twenty thousand, two hundred ten".