1200123101111 has 8 divisors (see below), whose sum is σ = 1309369323648. Its totient is φ = 1090900899000.

The previous prime is 1200123101077. The next prime is 1200123101131. The reversal of 1200123101111 is 1111013210021.

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

It is not a de Polignac number, because 1200123101111 - 2²² = 1200118906807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200123101131) 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, 5900555 + ... + 6100556.

It is an arithmetic number, because the mean of its divisors is an integer number (163671165456).

Almost surely, 2^{1200123101111} is an apocalyptic number.

1200123101111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1200123101111 is a deficient number, since it is larger than the sum of its proper divisors (109246222537).

1200123101111 is a wasteful number, since it uses less digits than its factorization.

1200123101111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12010213.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 1200123101111 its reverse (1111013210021), we get a palindrome (2311136311132).

The spelling of 1200123101111 in words is "one trillion, two hundred billion, one hundred twenty-three million, one hundred one thousand, one hundred eleven".