20021101206 has 16 divisors (see below), whose sum is σ = 40157601984. Its totient is φ = 6654467144.

The previous prime is 20021101189. The next prime is 20021101207. The reversal of 20021101206 is 60210112002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021101207) 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, 4806060 + ... + 4810223.

It is an arithmetic number, because the mean of its divisors is an integer number (2509850124).

Almost surely, 2^20021101206 is an apocalyptic number.

20021101206 is an abundant number, since it is smaller than the sum of its proper divisors (20136500778).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20021101206 is a wasteful number, since it uses less digits than its factorization.

20021101206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9616635.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 20021101206 its reverse (60210112002), we get a palindrome (80231213208).

The spelling of 20021101206 in words is "twenty billion, twenty-one million, one hundred one thousand, two hundred six".