101223112123 has 32 divisors (see below), whose sum is σ = 122496675840. Its totient is φ = 81708289920.

The previous prime is 101223112117. The next prime is 101223112153. The reversal of 101223112123 is 321211322101.

It is a cyclic number.

It is not a de Polignac number, because 101223112123 - 2²¹ = 101221014971 is a prime.

It is a super-2 number, since 2×101223112123² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 101223112123.

It is not an unprimeable number, because it can be changed into a prime (101223112153) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24347961 + ... + 24352117.

It is an arithmetic number, because the mean of its divisors is an integer number (3828021120).

Almost surely, 2^101223112123 is an apocalyptic number.

101223112123 is a deficient number, since it is larger than the sum of its proper divisors (21273563717).

101223112123 is a wasteful number, since it uses less digits than its factorization.

101223112123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5227.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 101223112123 its reverse (321211322101), we get a palindrome (422434434224).

The spelling of 101223112123 in words is "one hundred one billion, two hundred twenty-three million, one hundred twelve thousand, one hundred twenty-three".