21112677081 has 16 divisors (see below), whose sum is σ = 31312561600. Its totient is φ = 14059583424.

The previous prime is 21112677067. The next prime is 21112677119. The reversal of 21112677081 is 18077621112.

It is not a de Polignac number, because 21112677081 - 2¹⁴ = 21112660697 is a prime.

It is a super-2 number, since 2×21112677081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21112677011) 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 15 ways as a sum of consecutive naturals, for example, 406576 + ... + 455553.

It is an arithmetic number, because the mean of its divisors is an integer number (1957035100).

Almost surely, 2^21112677081 is an apocalyptic number.

It is an amenable number.

21112677081 is a deficient number, since it is larger than the sum of its proper divisors (10199884519).

21112677081 is an equidigital number, since it uses as much as digits as its factorization.

21112677081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863045 (or 863039 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 36.

The spelling of 21112677081 in words is "twenty-one billion, one hundred twelve million, six hundred seventy-seven thousand, eighty-one".