1201231232123 has 8 divisors (see below), whose sum is σ = 1293723740400. Its totient is φ = 1108751596128.

The previous prime is 1201231232111. The next prime is 1201231232129. The reversal of 1201231232123 is 3212321321021.

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 1201231232123 - 2²⁰ = 1201230183547 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1201231232129) 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, 3023813 + ... + 3397926.

It is an arithmetic number, because the mean of its divisors is an integer number (161715467550).

Almost surely, 2^{1201231232123} is an apocalyptic number.

1201231232123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1201231232123 is a deficient number, since it is larger than the sum of its proper divisors (92492508277).

1201231232123 is a wasteful number, since it uses less digits than its factorization.

1201231232123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6436141.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1201231232123 its reverse (3212321321021), we get a palindrome (4413552553144).

The spelling of 1201231232123 in words is "one trillion, two hundred one billion, two hundred thirty-one million, two hundred thirty-two thousand, one hundred twenty-three".