101220123 has 8 divisors (see below), whose sum is σ = 138607888. Its totient is φ = 65656224.

The previous prime is 101220113. The next prime is 101220137. The reversal of 101220123 is 321022101.

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

It is not a de Polignac number, because 101220123 - 2⁴ = 101220107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101220099 and 101220108.

It is not an unprimeable number, because it can be changed into a prime (101220113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 455836 + ... + 456057.

It is an arithmetic number, because the mean of its divisors is an integer number (17325986).

Almost surely, 2^101220123 is an apocalyptic number.

101220123 is a deficient number, since it is larger than the sum of its proper divisors (37387765).

101220123 is an equidigital number, since it uses as much as digits as its factorization.

101220123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911933.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 101220123 is about 10060.8211891475. The cubic root of 101220123 is about 466.0390270445.

Adding to 101220123 its reverse (321022101), we get a palindrome (422242224).

The spelling of 101220123 in words is "one hundred one million, two hundred twenty thousand, one hundred twenty-three".