101065421655 has 56 divisors (see below), whose sum is σ = 198365072400. Its totient is φ = 49001397120.

The previous prime is 101065421609. The next prime is 101065421659. The reversal of 101065421655 is 556124560101.

101065421655 is a `hidden beast` number, since 1 + 0 + 106 + 542 + 1 + 6 + 5 + 5 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-101065421655 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101065421659) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 1220230 + ... + 1300419.

Almost surely, 2^101065421655 is an apocalyptic number.

101065421655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

101065421655 is a deficient number, since it is larger than the sum of its proper divisors (97299650745).

101065421655 is an equidigital number, since it uses as much as digits as its factorization.

101065421655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2520683 (or 2520668 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

Adding to 101065421655 its reverse (556124560101), we get a palindrome (657189981756).

The spelling of 101065421655 in words is "one hundred one billion, sixty-five million, four hundred twenty-one thousand, six hundred fifty-five".