21310155310 has 16 divisors (see below), whose sum is σ = 38716770096. Its totient is φ = 8444397568.

The previous prime is 21310155277. The next prime is 21310155311. The reversal of 21310155310 is 1355101312.

It is a super-2 number, since 2×21310155310² (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 (21310155311) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 9956947 + ... + 9959086.

It is an arithmetic number, because the mean of its divisors is an integer number (2419798131).

Almost surely, 2^21310155310 is an apocalyptic number.

21310155310 is a deficient number, since it is larger than the sum of its proper divisors (17406614786).

21310155310 is a wasteful number, since it uses less digits than its factorization.

21310155310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19916147.

The product of its (nonzero) digits is 450, while the sum is 22.

Adding to 21310155310 its reverse (1355101312), we get a palindrome (22665256622).

The spelling of 21310155310 in words is "twenty-one billion, three hundred ten million, one hundred fifty-five thousand, three hundred ten".