20111020202 has 16 divisors (see below), whose sum is σ = 37128037632. Its totient is φ = 7956007920.

The previous prime is 20111020199. The next prime is 20111020207. The reversal of 20111020202 is 20202011102.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20111020207) 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, 55249874 + ... + 55250237.

It is an arithmetic number, because the mean of its divisors is an integer number (2320502352).

Almost surely, 2^20111020202 is an apocalyptic number.

20111020202 is a deficient number, since it is larger than the sum of its proper divisors (17017017430).

20111020202 is a wasteful number, since it uses less digits than its factorization.

20111020202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110500133.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20111020202 its reverse (20202011102), we get a palindrome (40313031304).

The spelling of 20111020202 in words is "twenty billion, one hundred eleven million, twenty thousand, two hundred two".