21311132444110 has 32 divisors (see below), whose sum is σ = 40380338662560. Its totient is φ = 8075527383168.

The previous prime is 21311132444101. The next prime is 21311132444111. The reversal of 21311132444110 is 1144423111312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21311132444111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3864124 + ... + 7586416.

It is an arithmetic number, because the mean of its divisors is an integer number (1261885583205).

Almost surely, 2^{21311132444110} is an apocalyptic number.

21311132444110 is a deficient number, since it is larger than the sum of its proper divisors (19069206218450).

21311132444110 is a wasteful number, since it uses less digits than its factorization.

21311132444110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3752452.

The product of its (nonzero) digits is 2304, while the sum is 28.

Adding to 21311132444110 its reverse (1144423111312), we get a palindrome (22455555555422).

The spelling of 21311132444110 in words is "twenty-one trillion, three hundred eleven billion, one hundred thirty-two million, four hundred forty-four thousand, one hundred ten".