21001220000101 has 8 divisors (see below), whose sum is σ = 22967555044608. Its totient is φ = 19044407160000.

The previous prime is 21001220000093. The next prime is 21001220000141. The reversal of 21001220000101 is 10100002210012.

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 21001220000101 - 2³ = 21001220000093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001220000141) 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, 2380546485 + ... + 2380555306.

It is an arithmetic number, because the mean of its divisors is an integer number (2870944380576).

Almost surely, 2^{21001220000101} is an apocalyptic number.

It is an amenable number.

21001220000101 is a deficient number, since it is larger than the sum of its proper divisors (1966335044507).

21001220000101 is a wasteful number, since it uses less digits than its factorization.

21001220000101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4761102203.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21001220000101 its reverse (10100002210012), we get a palindrome (31101222210113).

The spelling of 21001220000101 in words is "twenty-one trillion, one billion, two hundred twenty million, one hundred one", and thus it is an aban number.