1200111200101 has 12 divisors (see below), whose sum is σ = 1319189623276. Its totient is φ = 1090961277120.

The previous prime is 1200111200053. The next prime is 1200111200137. The reversal of 1200111200101 is 1010021110021.

It can be written as a sum of positive squares in 2 ways, for example, as 360324072900 + 839787127201 = 600270^2 + 916399^2 .

It is not a de Polignac number, because 1200111200101 - 2¹⁷ = 1200111069029 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 (1200111201101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2639881 + ... + 3060913.

Almost surely, 2^{1200111200101} is an apocalyptic number.

1200111200101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1200111200101 is a deficient number, since it is larger than the sum of its proper divisors (119078423175).

1200111200101 is a wasteful number, since it uses less digits than its factorization.

1200111200101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444612 (or 444601 counting only the distinct ones).

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

Adding to 1200111200101 its reverse (1010021110021), we get a palindrome (2210132310122).

The spelling of 1200111200101 in words is "one trillion, two hundred billion, one hundred eleven million, two hundred thousand, one hundred one".