21020101220201 has 4 divisors (see below), whose sum is σ = 21020155770000. Its totient is φ = 21020046670404.

The previous prime is 21020101220177. The next prime is 21020101220213. The reversal of 21020101220201 is 10202210102012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21020101220201 - 2¹⁰ = 21020101219177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21020101250201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26692751 + ... + 27468948.

It is an arithmetic number, because the mean of its divisors is an integer number (5255038942500).

Almost surely, 2^{21020101220201} is an apocalyptic number.

It is an amenable number.

21020101220201 is a deficient number, since it is larger than the sum of its proper divisors (54549799).

21020101220201 is an equidigital number, since it uses as much as digits as its factorization.

21020101220201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54549798.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21020101220201 its reverse (10202210102012), we get a palindrome (31222311322213).

The spelling of 21020101220201 in words is "twenty-one trillion, twenty billion, one hundred one million, two hundred twenty thousand, two hundred one".