21000101102201 has 8 divisors (see below), whose sum is σ = 22616423404680. Its totient is φ = 19383911644032.

The previous prime is 21000101102177. The next prime is 21000101102213. The reversal of 21000101102201 is 10220110100012.

It can be written as a sum of positive squares in 4 ways, for example, as 4668520776976 + 16331580325225 = 2160676^2 + 4041235^2 .

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

It is not a de Polignac number, because 21000101102201 - 2¹⁸ = 21000100840057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21000101107201) 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, 32882630 + ... + 33515183.

It is an arithmetic number, because the mean of its divisors is an integer number (2827052925585).

Almost surely, 2^{21000101102201} is an apocalyptic number.

It is an amenable number.

21000101102201 is a deficient number, since it is larger than the sum of its proper divisors (1616322302479).

21000101102201 is a wasteful number, since it uses less digits than its factorization.

21000101102201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66422155.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21000101102201 its reverse (10220110100012), we get a palindrome (31220211202213).

The spelling of 21000101102201 in words is "twenty-one trillion, one hundred one million, one hundred two thousand, two hundred one".