21311333110 has 64 divisors (see below), whose sum is σ = 41358600000. Its totient is φ = 7877578752.

The previous prime is 21311333101. The next prime is 21311333119. The reversal of 21311333110 is 1133311312.

It is an interprime number because it is at equal distance from previous prime (21311333101) and next prime (21311333119).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21311333119) 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 31 ways as a sum of consecutive naturals, for example, 2838141 + ... + 2845639.

It is an arithmetic number, because the mean of its divisors is an integer number (646228125).

Almost surely, 2^21311333110 is an apocalyptic number.

21311333110 is a deficient number, since it is larger than the sum of its proper divisors (20047266890).

21311333110 is a wasteful number, since it uses less digits than its factorization.

21311333110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7825.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 21311333110 its reverse (1133311312), we get a palindrome (22444644422).

The spelling of 21311333110 in words is "twenty-one billion, three hundred eleven million, three hundred thirty-three thousand, one hundred ten".