20213101001 has 4 divisors (see below), whose sum is σ = 20213385492. Its totient is φ = 20212816512.

The previous prime is 20213100991. The next prime is 20213101003. The reversal of 20213101001 is 10010131202.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 11054419600 + 9158681401 = 105140^2 + 95701^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20213101001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20213101003) 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, 64325 + ... + 211101.

It is an arithmetic number, because the mean of its divisors is an integer number (5053346373).

Almost surely, 2^20213101001 is an apocalyptic number.

It is an amenable number.

20213101001 is a deficient number, since it is larger than the sum of its proper divisors (284491).

20213101001 is a wasteful number, since it uses less digits than its factorization.

20213101001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284490.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 20213101001 its reverse (10010131202), we get a palindrome (30223232203).

The spelling of 20213101001 in words is "twenty billion, two hundred thirteen million, one hundred one thousand, one".