1200210110001 has 24 divisors (see below), whose sum is σ = 1981664607104. Its totient is φ = 685707871680.

The previous prime is 1200210109999. The next prime is 1200210110039. The reversal of 1200210110001 is 1000110120021.

It is a happy number.

It is not a de Polignac number, because 1200210110001 - 2¹ = 1200210109999 is a prime.

It is a super-2 number, since 2×1200210110001² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1200210110041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1411756 + ... + 2096061.

Almost surely, 2^{1200210110001} is an apocalyptic number.

It is an amenable number.

1200210110001 is a deficient number, since it is larger than the sum of its proper divisors (781454497103).

1200210110001 is a wasteful number, since it uses less digits than its factorization.

1200210110001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3513261 (or 3513258 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1200210110001 its reverse (1000110120021), we get a palindrome (2200320230022).

The spelling of 1200210110001 in words is "one trillion, two hundred billion, two hundred ten million, one hundred ten thousand, one".