1200200012001 has 6 divisors (see below), whose sum is σ = 1733622239570. Its totient is φ = 800133341328.

The previous prime is 1200200011987. The next prime is 1200200012027. The reversal of 1200200012001 is 1002100020021.

It can be written as a sum of positive squares in only one way, i.e., 921985960401 + 278214051600 = 960201^2 + 527460^2 .

It is not a de Polignac number, because 1200200012001 - 2⁷ = 1200200011873 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 133355556889 = 1200200012001 / (1 + 2 + 0 + 0 + 2 + 0 + 0 + 0 + 1 + 2 + 0 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1200200012201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 66677778436 + ... + 66677778453.

Almost surely, 2^{1200200012001} is an apocalyptic number.

It is an amenable number.

1200200012001 is a deficient number, since it is larger than the sum of its proper divisors (533422227569).

1200200012001 is a wasteful number, since it uses less digits than its factorization.

1200200012001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133355556895 (or 133355556892 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 1200200012001 its reverse (1002100020021), we get a palindrome (2202300032022).

The spelling of 1200200012001 in words is "one trillion, two hundred billion, two hundred million, twelve thousand, one".