21112021021101 has 32 divisors (see below), whose sum is σ = 28700981760000. Its totient is φ = 13801337679168.

The previous prime is 21112021021087. The next prime is 21112021021127. The reversal of 21112021021101 is 10112012021112.

It is a happy number.

It is not a de Polignac number, because 21112021021101 - 2¹⁸ = 21112020758957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112021021501) 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, 281159880 + ... + 281234958.

It is an arithmetic number, because the mean of its divisors is an integer number (896905680000).

Almost surely, 2^{21112021021101} is an apocalyptic number.

It is an amenable number.

21112021021101 is a deficient number, since it is larger than the sum of its proper divisors (7588960738899).

21112021021101 is a wasteful number, since it uses less digits than its factorization.

21112021021101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83273.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21112021021101 its reverse (10112012021112), we get a palindrome (31224033042213).

The spelling of 21112021021101 in words is "twenty-one trillion, one hundred twelve billion, twenty-one million, twenty-one thousand, one hundred one".