21021102220101 has 8 divisors (see below), whose sum is σ = 28028290434144. Its totient is φ = 14013991076400.

The previous prime is 21021102220099. The next prime is 21021102220193. The reversal of 21021102220101 is 10102220112012.

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

It is not a de Polignac number, because 21021102220101 - 2¹ = 21021102220099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021102222101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18628131 + ... + 19724336.

It is an arithmetic number, because the mean of its divisors is an integer number (3503536304268).

Almost surely, 2^{21021102220101} is an apocalyptic number.

It is an amenable number.

21021102220101 is a deficient number, since it is larger than the sum of its proper divisors (7007188214043).

21021102220101 is a wasteful number, since it uses less digits than its factorization.

21021102220101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38535171.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21021102220101 its reverse (10102220112012), we get a palindrome (31123322332113).

The spelling of 21021102220101 in words is "twenty-one trillion, twenty-one billion, one hundred two million, two hundred twenty thousand, one hundred one".