101221254656 has 20 divisors (see below), whose sum is σ = 202244812572. Its totient is φ = 50610627072.

The previous prime is 101221254647. The next prime is 101221254671. The reversal of 101221254656 is 656452122101.

101221254656 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98848370 + ... + 98849393.

Almost surely, 2^101221254656 is an apocalyptic number.

101221254656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

101221254656 is a deficient number, since it is larger than the sum of its proper divisors (101023557916).

101221254656 is an frugal number, since it uses more digits than its factorization.

101221254656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197697781 (or 197697765 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

Adding to 101221254656 its reverse (656452122101), we get a palindrome (757673376757).

The spelling of 101221254656 in words is "one hundred one billion, two hundred twenty-one million, two hundred fifty-four thousand, six hundred fifty-six".