21311411373 has 48 divisors (see below), whose sum is σ = 36675505152. Its totient is φ = 11668320000.

The previous prime is 21311411371. The next prime is 21311411437. The reversal of 21311411373 is 37311411312.

21311411373 is a `hidden beast` number, since 213 + 1 + 1 + 411 + 37 + 3 = 666.

It is not a de Polignac number, because 21311411373 - 2¹ = 21311411371 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21311411371) 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 47 ways as a sum of consecutive naturals, for example, 143233 + ... + 251273.

It is an arithmetic number, because the mean of its divisors is an integer number (764073024).

Almost surely, 2^21311411373 is an apocalyptic number.

It is an amenable number.

21311411373 is a deficient number, since it is larger than the sum of its proper divisors (15364093779).

21311411373 is a wasteful number, since it uses less digits than its factorization.

21311411373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108186 (or 108183 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

Adding to 21311411373 its reverse (37311411312), we get a palindrome (58622822685).

The spelling of 21311411373 in words is "twenty-one billion, three hundred eleven million, four hundred eleven thousand, three hundred seventy-three".