21111201310 has 16 divisors (see below), whose sum is σ = 38883887856. Its totient is φ = 8248097088.

The previous prime is 21111201299. The next prime is 21111201487. The reversal of 21111201310 is 1310211112.

It is a happy number.

It is a super-2 number, since 2×21111201310² (a number of 21 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 24547479 + ... + 24548338.

It is an arithmetic number, because the mean of its divisors is an integer number (2430242991).

Almost surely, 2^21111201310 is an apocalyptic number.

21111201310 is a deficient number, since it is larger than the sum of its proper divisors (17772686546).

21111201310 is a wasteful number, since it uses less digits than its factorization.

21111201310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49095867.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 21111201310 its reverse (1310211112), we get a palindrome (22421412422).

The spelling of 21111201310 in words is "twenty-one billion, one hundred eleven million, two hundred one thousand, three hundred ten".