101221120123 has 8 divisors (see below), whose sum is σ = 101563202048. Its totient is φ = 100879119144.

The previous prime is 101221120111. The next prime is 101221120127. The reversal of 101221120123 is 321021122101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 101221120123 - 2¹³ = 101221111931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101221120097 and 101221120106.

It is not an unprimeable number, because it can be changed into a prime (101221120127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3517090 + ... + 3545752.

It is an arithmetic number, because the mean of its divisors is an integer number (12695400256).

Almost surely, 2^101221120123 is an apocalyptic number.

101221120123 is a deficient number, since it is larger than the sum of its proper divisors (342081925).

101221120123 is a wasteful number, since it uses less digits than its factorization.

101221120123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40473.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 101221120123 its reverse (321021122101), we get a palindrome (422242242224).

The spelling of 101221120123 in words is "one hundred one billion, two hundred twenty-one million, one hundred twenty thousand, one hundred twenty-three".