1201111323023 has 4 divisors (see below), whose sum is σ = 1213493914080. Its totient is φ = 1188728731968.

The previous prime is 1201111323007. The next prime is 1201111323053. The reversal of 1201111323023 is 3203231111021.

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 1201111323023 - 2⁴ = 1201111323007 is a prime.

It is a super-2 number, since 2×1201111323023² (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 = 1201111322986 and 1201111323004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201111323053) 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, 6191295383 + ... + 6191295576.

It is an arithmetic number, because the mean of its divisors is an integer number (303373478520).

Almost surely, 2^{1201111323023} is an apocalyptic number.

1201111323023 is a deficient number, since it is larger than the sum of its proper divisors (12382591057).

1201111323023 is an equidigital number, since it uses as much as digits as its factorization.

1201111323023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12382591056.

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

Adding to 1201111323023 its reverse (3203231111021), we get a palindrome (4404342434044).

The spelling of 1201111323023 in words is "one trillion, two hundred one billion, one hundred eleven million, three hundred twenty-three thousand, twenty-three".