1200010002001 has 2 divisors, whose sum is σ = 1200010002002. Its totient is φ = 1200010002000.

The previous prime is 1200010001977. The next prime is 1200010002019. The reversal of 1200010002001 is 1002000100021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1198882654225 + 1127347776 = 1094935^2 + 33576^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200010002001 - 2¹¹ = 1200009999953 is a prime.

It is not a weakly prime, because it can be changed into another prime (1200010002031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600005001000 + 600005001001.

It is an arithmetic number, because the mean of its divisors is an integer number (600005001001).

Almost surely, 2^{1200010002001} is an apocalyptic number.

It is an amenable number.

1200010002001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200010002001 is an equidigital number, since it uses as much as digits as its factorization.

1200010002001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 1200010002001 its reverse (1002000100021), we get a palindrome (2202010102022).

The spelling of 1200010002001 in words is "one trillion, two hundred billion, ten million, two thousand, one".