20202111121 has 8 divisors (see below), whose sum is σ = 20411170560. Its totient is φ = 19993483152.

The previous prime is 20202111079. The next prime is 20202111151. The reversal of 20202111121 is 12111120202.

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

It is a cyclic number.

It is not a de Polignac number, because 20202111121 - 2¹¹ = 20202109073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20202111151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13315 + ... + 201448.

It is an arithmetic number, because the mean of its divisors is an integer number (2551396320).

Almost surely, 2^20202111121 is an apocalyptic number.

It is an amenable number.

20202111121 is a deficient number, since it is larger than the sum of its proper divisors (209059439).

20202111121 is a wasteful number, since it uses less digits than its factorization.

20202111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215735.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20202111121 its reverse (12111120202), we get a palindrome (32313231323).

The spelling of 20202111121 in words is "twenty billion, two hundred two million, one hundred eleven thousand, one hundred twenty-one".