21655101133112 has 32 divisors (see below), whose sum is σ = 41006894209200. Its totient is φ = 10719937536000.

The previous prime is 21655101133109. The next prime is 21655101133121. The reversal of 21655101133112 is 21133110155612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21221339 + ... + 22218357.

Almost surely, 2^{21655101133112} is an apocalyptic number.

It is an amenable number.

21655101133112 is a deficient number, since it is larger than the sum of its proper divisors (19351793076088).

21655101133112 is a wasteful number, since it uses less digits than its factorization.

21655101133112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1024007 (or 1024003 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 32.

Adding to 21655101133112 its reverse (21133110155612), we get a palindrome (42788211288724).

The spelling of 21655101133112 in words is "twenty-one trillion, six hundred fifty-five billion, one hundred one million, one hundred thirty-three thousand, one hundred twelve".