21210223310 has 8 divisors (see below), whose sum is σ = 38178401976. Its totient is φ = 8484089320.

The previous prime is 21210223277. The next prime is 21210223313. The reversal of 21210223310 is 1332201212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21210223310² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210223313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1060511156 + ... + 1060511175.

It is an arithmetic number, because the mean of its divisors is an integer number (4772300247).

Almost surely, 2^21210223310 is an apocalyptic number.

21210223310 is a deficient number, since it is larger than the sum of its proper divisors (16968178666).

21210223310 is a wasteful number, since it uses less digits than its factorization.

21210223310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2121022338.

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

Adding to 21210223310 its reverse (1332201212), we get a palindrome (22542424522).

The spelling of 21210223310 in words is "twenty-one billion, two hundred ten million, two hundred twenty-three thousand, three hundred ten".