21111031310 has 32 divisors (see below), whose sum is σ = 39890534400. Its totient is φ = 8033496480.

The previous prime is 21111031301. The next prime is 21111031363. The reversal of 21111031310 is 1313011112.

It is a happy number.

It is a super-2 number, since 2×21111031310² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 558830 + ... + 595409.

It is an arithmetic number, because the mean of its divisors is an integer number (1246579200).

Almost surely, 2^21111031310 is an apocalyptic number.

21111031310 is a deficient number, since it is larger than the sum of its proper divisors (18779503090).

21111031310 is a wasteful number, since it uses less digits than its factorization.

21111031310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1154336.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 21111031310 its reverse (1313011112), we get a palindrome (22424042422).

The spelling of 21111031310 in words is "twenty-one billion, one hundred eleven million, thirty-one thousand, three hundred ten".