1200111210001 has 4 divisors (see below), whose sum is σ = 1309212229104. Its totient is φ = 1091010190900.

The previous prime is 1200111209987. The next prime is 1200111210097. The reversal of 1200111210001 is 1000121110021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1200111210001 - 2⁷ = 1200111209873 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1200111210001.

It is not an unprimeable number, because it can be changed into a prime (1200111219001) 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, 54550509535 + ... + 54550509556.

It is an arithmetic number, because the mean of its divisors is an integer number (327303057276).

Almost surely, 2^{1200111210001} is an apocalyptic number.

1200111210001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1200111210001 is a deficient number, since it is larger than the sum of its proper divisors (109101019103).

1200111210001 is a wasteful number, since it uses less digits than its factorization.

1200111210001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109101019102.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1200111210001 its reverse (1000121110021), we get a palindrome (2200232320022).

The spelling of 1200111210001 in words is "one trillion, two hundred billion, one hundred eleven million, two hundred ten thousand, one".