21310042311 has 48 divisors (see below), whose sum is σ = 31857096960. Its totient is φ = 13720734720.

The previous prime is 21310042307. The next prime is 21310042331. The reversal of 21310042311 is 11324001312.

21310042311 is a `hidden beast` number, since 2 + 1 + 310 + 0 + 42 + 311 = 666.

It is not a de Polignac number, because 21310042311 - 2² = 21310042307 is a prime.

It is a super-2 number, since 2×21310042311² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21310042301) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 8261620 + ... + 8264198.

It is an arithmetic number, because the mean of its divisors is an integer number (663689520).

Almost surely, 2^21310042311 is an apocalyptic number.

21310042311 is a deficient number, since it is larger than the sum of its proper divisors (10547054649).

21310042311 is a wasteful number, since it uses less digits than its factorization.

21310042311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2916 (or 2913 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21310042311 its reverse (11324001312), we get a palindrome (32634043623).

The spelling of 21310042311 in words is "twenty-one billion, three hundred ten million, forty-two thousand, three hundred eleven".