1011312201001 has 4 divisors (see below), whose sum is σ = 1027891089604. Its totient is φ = 994733312400.

The previous prime is 1011312200981. The next prime is 1011312201091. The reversal of 1011312201001 is 1001022131101.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 500160128400 + 511152072601 = 707220^2 + 714949^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011312201001 - 2⁹ = 1011312200489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011312201091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8289444210 + ... + 8289444331.

It is an arithmetic number, because the mean of its divisors is an integer number (256972772401).

Almost surely, 2^{1011312201001} is an apocalyptic number.

It is an amenable number.

1011312201001 is a deficient number, since it is larger than the sum of its proper divisors (16578888603).

1011312201001 is an equidigital number, since it uses as much as digits as its factorization.

1011312201001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16578888602.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 1011312201001 its reverse (1001022131101), we get a palindrome (2012334332102).

The spelling of 1011312201001 in words is "one trillion, eleven billion, three hundred twelve million, two hundred one thousand, one".