1101511202401 has 2 divisors, whose sum is σ = 1101511202402. Its totient is φ = 1101511202400.

The previous prime is 1101511202357. The next prime is 1101511202479. The reversal of 1101511202401 is 1042021151011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 809613046225 + 291898156176 = 899785^2 + 540276^2 .

It is a cyclic number.

It is not a de Polignac number, because 1101511202401 - 2¹¹ = 1101511200353 is a prime.

It is not a weakly prime, because it can be changed into another prime (1101511202801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550755601200 + 550755601201.

It is an arithmetic number, because the mean of its divisors is an integer number (550755601201).

Almost surely, 2^{1101511202401} is an apocalyptic number.

It is an amenable number.

1101511202401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101511202401 is an equidigital number, since it uses as much as digits as its factorization.

1101511202401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 19.

Adding to 1101511202401 its reverse (1042021151011), we get a palindrome (2143532353412).

The spelling of 1101511202401 in words is "one trillion, one hundred one billion, five hundred eleven million, two hundred two thousand, four hundred one".