21101222011021 has 8 divisors (see below), whose sum is σ = 22212030499200. Its totient is φ = 19990435308480.

The previous prime is 21101222011019. The next prime is 21101222011063. The reversal of 21101222011021 is 12011022210112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21101222011021 - 2¹ = 21101222011019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21101222010986 and 21101222011004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101222011321) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 3439285 + ... + 7350586.

It is an arithmetic number, because the mean of its divisors is an integer number (2776503812400).

Almost surely, 2^{21101222011021} is an apocalyptic number.

It is an amenable number.

21101222011021 is a deficient number, since it is larger than the sum of its proper divisors (1110808488179).

21101222011021 is a wasteful number, since it uses less digits than its factorization.

21101222011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10892819.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21101222011021 its reverse (12011022210112), we get a palindrome (33112244221133).

The spelling of 21101222011021 in words is "twenty-one trillion, one hundred one billion, two hundred twenty-two million, eleven thousand, twenty-one".