20001202101 has 20 divisors (see below), whose sum is σ = 29882161452. Its totient is φ = 13332428928.

The previous prime is 20001202057. The next prime is 20001202127. The reversal of 20001202101 is 10120210002.

It can be written as a sum of positive squares in 2 ways, for example, as 13771257201 + 6229944900 = 117351^2 + 78930^2 .

It is not a de Polignac number, because 20001202101 - 2⁷ = 20001201973 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001202141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1141261 + ... + 1158653.

Almost surely, 2^20001202101 is an apocalyptic number.

It is an amenable number.

20001202101 is a deficient number, since it is larger than the sum of its proper divisors (9880959351).

20001202101 is a wasteful number, since it uses less digits than its factorization.

20001202101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31602 (or 31593 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20001202101 its reverse (10120210002), we get a palindrome (30121412103).

The spelling of 20001202101 in words is "twenty billion, one million, two hundred two thousand, one hundred one".