12101021123 has 8 divisors (see below), whose sum is σ = 12182032800. Its totient is φ = 12020254848.

The previous prime is 12101021113. The next prime is 12101021159. The reversal of 12101021123 is 32112010121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12101021123 is a prime.

It is a super-2 number, since 2×12101021123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12101021098 and 12101021107.

It is not an unprimeable number, because it can be changed into a prime (12101021113) 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, 38138 + ... + 160176.

It is an arithmetic number, because the mean of its divisors is an integer number (1522754100).

Almost surely, 2^12101021123 is an apocalyptic number.

12101021123 is a deficient number, since it is larger than the sum of its proper divisors (81011677).

12101021123 is a wasteful number, since it uses less digits than its factorization.

12101021123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122701.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 12101021123 its reverse (32112010121), we get a palindrome (44213031244).

The spelling of 12101021123 in words is "twelve billion, one hundred one million, twenty-one thousand, one hundred twenty-three".