123021100111 has 8 divisors (see below), whose sum is σ = 151410584864. Its totient is φ = 97335375840.

The previous prime is 123021100087. The next prime is 123021100123. The reversal of 123021100111 is 111001120321.

It is a happy number.

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 123021100111 - 2¹⁵ = 123021067343 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 123021100091 and 123021100100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123021100711) 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, 675940020 + ... + 675940201.

It is an arithmetic number, because the mean of its divisors is an integer number (18926323108).

Almost surely, 2^123021100111 is an apocalyptic number.

123021100111 is a deficient number, since it is larger than the sum of its proper divisors (28389484753).

123021100111 is a wasteful number, since it uses less digits than its factorization.

123021100111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1351880241.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 123021100111 its reverse (111001120321), we get a palindrome (234022220432).

The spelling of 123021100111 in words is "one hundred twenty-three billion, twenty-one million, one hundred thousand, one hundred eleven".