20010101001001 has 8 divisors (see below), whose sum is σ = 21084691763520. Its totient is φ = 18937652993712.

The previous prime is 20010101000969. The next prime is 20010101001043. The reversal of 20010101001001 is 10010010101002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20010101001001 - 2⁵ = 20010101000969 is a prime.

It is a super-2 number, since 2×20010101001001² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20010101001301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 535669630 + ... + 535706983.

It is an arithmetic number, because the mean of its divisors is an integer number (2635586470440).

Almost surely, 2^{20010101001001} is an apocalyptic number.

It is an amenable number.

20010101001001 is a deficient number, since it is larger than the sum of its proper divisors (1074590762519).

20010101001001 is a wasteful number, since it uses less digits than its factorization.

20010101001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071377615.

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 20010101001001 its reverse (10010010101002), we get a palindrome (30020111102003).

The spelling of 20010101001001 in words is "twenty trillion, ten billion, one hundred one million, one thousand, one".