21611411612 has 48 divisors (see below), whose sum is σ = 43480765440. Its totient is φ = 9206928192.

The previous prime is 21611411611. The next prime is 21611411617.

21611411612 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×21611411612² (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 (21611411611) 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, 3434333 + ... + 3440619.

It is an arithmetic number, because the mean of its divisors is an integer number (905849280).

Almost surely, 2^21611411612 is an apocalyptic number.

It is an amenable number.

21611411612 is an abundant number, since it is smaller than the sum of its proper divisors (21869353828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21611411612 is a wasteful number, since it uses less digits than its factorization.

21611411612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7010 (or 7008 counting only the distinct ones).

The product of its digits is 576, while the sum is 26.

The spelling of 21611411612 in words is "twenty-one billion, six hundred eleven million, four hundred eleven thousand, six hundred twelve".