21230212310 has 32 divisors (see below), whose sum is σ = 38715541920. Its totient is φ = 8381325312.

The previous prime is 21230212253. The next prime is 21230212331. The reversal of 21230212310 is 1321203212.

It is a super-2 number, since 2×21230212310² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 242237 + ... + 318023.

It is an arithmetic number, because the mean of its divisors is an integer number (1209860685).

Almost surely, 2^21230212310 is an apocalyptic number.

21230212310 is a deficient number, since it is larger than the sum of its proper divisors (17485329610).

21230212310 is a wasteful number, since it uses less digits than its factorization.

21230212310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76160.

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

Adding to 21230212310 its reverse (1321203212), we get a palindrome (22551415522).

The spelling of 21230212310 in words is "twenty-one billion, two hundred thirty million, two hundred twelve thousand, three hundred ten".