1101201021001 has 2 divisors, whose sum is σ = 1101201021002. Its totient is φ = 1101201021000.

The previous prime is 1101201020993. The next prime is 1101201021031. The reversal of 1101201021001 is 1001201021011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 820973717776 + 280227303225 = 906076^2 + 529365^2 .

It is an emirp because it is prime and its reverse (1001201021011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1101201021001 - 2³ = 1101201020993 is a prime.

It is not a weakly prime, because it can be changed into another prime (1101201021031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550600510500 + 550600510501.

It is an arithmetic number, because the mean of its divisors is an integer number (550600510501).

Almost surely, 2^{1101201021001} is an apocalyptic number.

It is an amenable number.

1101201021001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101201021001 is an equidigital number, since it uses as much as digits as its factorization.

1101201021001 is an odious number, because the sum of its binary digits is odd.

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

Adding to 1101201021001 its sum of digits (10), we get a palindrome (1101201021011).

Adding to 1101201021001 its reverse (1001201021011), we get a palindrome (2102402042012).

It can be divided in two parts, 11012010 and 21001, that added together give a palindrome (11033011).

The spelling of 1101201021001 in words is "one trillion, one hundred one billion, two hundred one million, twenty-one thousand, one".