21001102210012 has 96 divisors (see below), whose sum is σ = 39788608043520. Its totient is φ = 9668542786560.

The previous prime is 21001102210009. The next prime is 21001102210013. The reversal of 21001102210012 is 21001220110012.

It is a junction number, because it is equal to n+sod(n) for n = 21001102209974 and 21001102210001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001102210013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 848071543 + ... + 848096305.

It is an arithmetic number, because the mean of its divisors is an integer number (414464667120).

Almost surely, 2^{21001102210012} is an apocalyptic number.

It is an amenable number.

21001102210012 is a deficient number, since it is larger than the sum of its proper divisors (18787505833508).

21001102210012 is a wasteful number, since it uses less digits than its factorization.

21001102210012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27083 (or 27081 counting only the distinct ones).

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

Adding to 21001102210012 its reverse (21001220110012), we get a palindrome (42002322320024).

The spelling of 21001102210012 in words is "twenty-one trillion, one billion, one hundred two million, two hundred ten thousand, twelve".