20202121112 has 16 divisors (see below), whose sum is σ = 37899164400. Its totient is φ = 10095677280.

The previous prime is 20202121099. The next prime is 20202121117. The reversal of 20202121112 is 21112120202.

It is a super-2 number, since 2×20202121112² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20202121117) 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 3 ways as a sum of consecutive naturals, for example, 656939 + ... + 687002.

It is an arithmetic number, because the mean of its divisors is an integer number (2368697775).

Almost surely, 2^20202121112 is an apocalyptic number.

It is an amenable number.

20202121112 is a deficient number, since it is larger than the sum of its proper divisors (17697043288).

20202121112 is a wasteful number, since it uses less digits than its factorization.

20202121112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345826 (or 1345822 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20202121112 its reverse (21112120202), we get a palindrome (41314241314).

The spelling of 20202121112 in words is "twenty billion, two hundred two million, one hundred twenty-one thousand, one hundred twelve".