20101001001 has 8 divisors (see below), whose sum is σ = 26805860640. Its totient is φ = 13398404352.

The previous prime is 20101000981. The next prime is 20101001017. The reversal of 20101001001 is 10010010102.

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

It is not a de Polignac number, because 20101001001 - 2¹³ = 20100992809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20101001051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 544911 + ... + 580628.

It is an arithmetic number, because the mean of its divisors is an integer number (3350732580).

Almost surely, 2^20101001001 is an apocalyptic number.

It is an amenable number.

20101001001 is a deficient number, since it is larger than the sum of its proper divisors (6704859639).

20101001001 is a wasteful number, since it uses less digits than its factorization.

20101001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131495.

The product of its (nonzero) digits is 2, while the sum is 6.

Adding to 20101001001 its reverse (10010010102), we get a palindrome (30111011103).

The spelling of 20101001001 in words is "twenty billion, one hundred one million, one thousand, one".