201011101002001 has 4 divisors (see below), whose sum is σ = 201166082576932. Its totient is φ = 200856119427072.

The previous prime is 201011101001993. The next prime is 201011101002007. The reversal of 201011101002001 is 100200101110102.

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 105551459582976 + 95459641419025 = 10273824^2 + 9770345^2 .

It is a cyclic number.

It is not a de Polignac number, because 201011101002001 - 2³ = 201011101001993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201011101002007) 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, 77490785520 + ... + 77490788113.

It is an arithmetic number, because the mean of its divisors is an integer number (50291520644233).

Almost surely, 2^{201011101002001} is an apocalyptic number.

It is an amenable number.

201011101002001 is a deficient number, since it is larger than the sum of its proper divisors (154981574931).

201011101002001 is a wasteful number, since it uses less digits than its factorization.

201011101002001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154981574930.

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

Adding to 201011101002001 its reverse (100200101110102), we get a palindrome (301211202112103).

The spelling of 201011101002001 in words is "two hundred one trillion, eleven billion, one hundred one million, two thousand, one".