1001101213001 has 2 divisors, whose sum is σ = 1001101213002. Its totient is φ = 1001101213000.

The previous prime is 1001101212997. The next prime is 1001101213061. The reversal of 1001101213001 is 1003121011001.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 930385639225 + 70715573776 = 964565^2 + 265924^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001101213001 - 2² = 1001101212997 is a prime.

It is not a weakly prime, because it can be changed into another prime (1001101213061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500550606500 + 500550606501.

It is an arithmetic number, because the mean of its divisors is an integer number (500550606501).

Almost surely, 2^{1001101213001} is an apocalyptic number.

It is an amenable number.

1001101213001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001101213001 is an equidigital number, since it uses as much as digits as its factorization.

1001101213001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6, while the sum is 11.

Adding to 1001101213001 its reverse (1003121011001), we get a palindrome (2004222224002).

The spelling of 1001101213001 in words is "one trillion, one billion, one hundred one million, two hundred thirteen thousand, one".