21012102022112 has 24 divisors (see below), whose sum is σ = 41369026758696. Its totient is φ = 10505682527872.

The previous prime is 21012102022111. The next prime is 21012102022199. The reversal of 21012102022112 is 21122020121012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012102022111) 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, 10587323 + ... + 12414330.

It is an arithmetic number, because the mean of its divisors is an integer number (1723709448279).

Almost surely, 2^{21012102022112} is an apocalyptic number.

It is an amenable number.

21012102022112 is a deficient number, since it is larger than the sum of its proper divisors (20356924736584).

21012102022112 is a wasteful number, since it uses less digits than its factorization.

21012102022112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23030210 (or 23030202 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21012102022112 its reverse (21122020121012), we get a palindrome (42134122143124).

The spelling of 21012102022112 in words is "twenty-one trillion, twelve billion, one hundred two million, twenty-two thousand, one hundred twelve".