12101213123 has 16 divisors (see below), whose sum is σ = 13132897536. Its totient is φ = 11120487840.

The previous prime is 12101213101. The next prime is 12101213153. The reversal of 12101213123 is 32131210121.

It is a cyclic number.

It is not a de Polignac number, because 12101213123 - 2¹⁰ = 12101212099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12101213153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39965 + ... + 160622.

It is an arithmetic number, because the mean of its divisors is an integer number (820806096).

Almost surely, 2^12101213123 is an apocalyptic number.

12101213123 is a deficient number, since it is larger than the sum of its proper divisors (1031684413).

12101213123 is a wasteful number, since it uses less digits than its factorization.

12101213123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200714.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 12101213123 its reverse (32131210121), we get a palindrome (44232423244).

The spelling of 12101213123 in words is "twelve billion, one hundred one million, two hundred thirteen thousand, one hundred twenty-three".