21022021212101 has 8 divisors (see below), whose sum is σ = 25873256876544. Its totient is φ = 16632807991920.

The previous prime is 21022021212091. The next prime is 21022021212109. The reversal of 21022021212101 is 10121212022012.

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 21022021212101 - 2¹⁰ = 21022021211077 is a prime.

It is a super-3 number, since 3×21022021212101³ (a number of 41 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21022021212101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022021212109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115505610965 + ... + 115505611146.

It is an arithmetic number, because the mean of its divisors is an integer number (3234157109568).

Almost surely, 2^{21022021212101} is an apocalyptic number.

It is an amenable number.

21022021212101 is a deficient number, since it is larger than the sum of its proper divisors (4851235664443).

21022021212101 is a wasteful number, since it uses less digits than its factorization.

21022021212101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231011222131.

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

Adding to 21022021212101 its reverse (10121212022012), we get a palindrome (31143233234113).

The spelling of 21022021212101 in words is "twenty-one trillion, twenty-two billion, twenty-one million, two hundred twelve thousand, one hundred one".