21110110131 has 8 divisors (see below), whose sum is σ = 30705614784. Its totient is φ = 12794006120.

The previous prime is 21110110103. The next prime is 21110110139. The reversal of 21110110131 is 13101101112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21110110131 - 2⁶ = 21110110067 is a prime.

It is a super-2 number, since 2×21110110131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21110110139) 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 7 ways as a sum of consecutive naturals, for example, 319850121 + ... + 319850186.

It is an arithmetic number, because the mean of its divisors is an integer number (3838201848).

Almost surely, 2^21110110131 is an apocalyptic number.

21110110131 is a deficient number, since it is larger than the sum of its proper divisors (9595504653).

21110110131 is a wasteful number, since it uses less digits than its factorization.

21110110131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639700321.

The product of its (nonzero) digits is 6, while the sum is 12.

Adding to 21110110131 its reverse (13101101112), we get a palindrome (34211211243).

The spelling of 21110110131 in words is "twenty-one billion, one hundred ten million, one hundred ten thousand, one hundred thirty-one".