1011201011001 has 12 divisors (see below), whose sum is σ = 1482424036912. Its totient is φ = 664072305336.

The previous prime is 1011201010993. The next prime is 1011201011003. The reversal of 1011201011001 is 1001101021101.

It is not a de Polignac number, because 1011201011001 - 2³ = 1011201010993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011201011003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 838474531 + ... + 838475736.

Almost surely, 2^{1011201011001} is an apocalyptic number.

It is an amenable number.

1011201011001 is a deficient number, since it is larger than the sum of its proper divisors (471223025911).

1011201011001 is a wasteful number, since it uses less digits than its factorization.

1011201011001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1676950340 (or 1676950337 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 1011201011001 its reverse (1001101021101), we get a palindrome (2012302032102).

The spelling of 1011201011001 in words is "one trillion, eleven billion, two hundred one million, eleven thousand, one".