1200121002101 has 12 divisors (see below), whose sum is σ = 1396439007948. Its totient is φ = 1028395230912.

The previous prime is 1200121002061. The next prime is 1200121002133. The reversal of 1200121002101 is 1012001210021.

It can be written as a sum of positive squares in 2 ways, for example, as 811494688900 + 388626313201 = 900830^2 + 623399^2 .

It is not a de Polignac number, because 1200121002101 - 2¹⁰ = 1200121001077 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 (1200121002191) 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, 3150296 + ... + 3510641.

It is an arithmetic number, because the mean of its divisors is an integer number (116369917329).

Almost surely, 2^{1200121002101} is an apocalyptic number.

It is an amenable number.

1200121002101 is a deficient number, since it is larger than the sum of its proper divisors (196318005847).

1200121002101 is an equidigital number, since it uses as much as digits as its factorization.

1200121002101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6664628 (or 6664621 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1200121002101 its reverse (1012001210021), we get a palindrome (2212122212122).

The spelling of 1200121002101 in words is "one trillion, two hundred billion, one hundred twenty-one million, two thousand, one hundred one".