1231230101123 has 4 divisors (see below), whose sum is σ = 1343160110328. Its totient is φ = 1119300091920.

The previous prime is 1231230101119. The next prime is 1231230101191. The reversal of 1231230101123 is 3211010321321.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1231230101123 - 2² = 1231230101119 is a prime.

It is a super-2 number, since 2×1231230101123² (a number of 25 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 = 1231230101095 and 1231230101104.

It is not an unprimeable number, because it can be changed into a prime (1231230103123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55965004586 + ... + 55965004607.

It is an arithmetic number, because the mean of its divisors is an integer number (335790027582).

Almost surely, 2^{1231230101123} is an apocalyptic number.

1231230101123 is a deficient number, since it is larger than the sum of its proper divisors (111930009205).

1231230101123 is a wasteful number, since it uses less digits than its factorization.

1231230101123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111930009204.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1231230101123 its reverse (3211010321321), we get a palindrome (4442240422444).

The spelling of 1231230101123 in words is "one trillion, two hundred thirty-one billion, two hundred thirty million, one hundred one thousand, one hundred twenty-three".