20212121101112 has 32 divisors (see below), whose sum is σ = 37921486512000. Its totient is φ = 10099725321600.

The previous prime is 20212121101111. The next prime is 20212121101121. The reversal of 20212121101112 is 21110112121202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212121101111) 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, 515608889 + ... + 515648087.

It is an arithmetic number, because the mean of its divisors is an integer number (1185046453500).

Almost surely, 2^{20212121101112} is an apocalyptic number.

It is an amenable number.

20212121101112 is a deficient number, since it is larger than the sum of its proper divisors (17709365410888).

20212121101112 is a wasteful number, since it uses less digits than its factorization.

20212121101112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77967 (or 77963 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 20212121101112 its reverse (21110112121202), we get a palindrome (41322233222314).

The spelling of 20212121101112 in words is "twenty trillion, two hundred twelve billion, one hundred twenty-one million, one hundred one thousand, one hundred twelve".