21112021012112 has 10 divisors (see below), whose sum is σ = 40904540710998. Its totient is φ = 10556010506048.

The previous prime is 21112021012087. The next prime is 21112021012129. The reversal of 21112021012112 is 21121012021112.

It can be written as a sum of positive squares in only one way, i.e., 11951374469776 + 9160646542336 = 3457076^2 + 3026656^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659750656613 + ... + 659750656644.

Almost surely, 2^{21112021012112} is an apocalyptic number.

It is an amenable number.

21112021012112 is a deficient number, since it is larger than the sum of its proper divisors (19792519698886).

21112021012112 is a wasteful number, since it uses less digits than its factorization.

21112021012112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1319501313265 (or 1319501313259 counting only the distinct ones).

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

Adding to 21112021012112 its reverse (21121012021112), we get a palindrome (42233033033224).

The spelling of 21112021012112 in words is "twenty-one trillion, one hundred twelve billion, twenty-one million, twelve thousand, one hundred twelve".