21020112122201 has 8 divisors (see below), whose sum is σ = 21042165386880. Its totient is φ = 20998059511968.

The previous prime is 21020112122189. The next prime is 21020112122213. The reversal of 21020112122201 is 10222121102012.

It is an interprime number because it is at equal distance from previous prime (21020112122189) and next prime (21020112122213).

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 21020112122201 - 2²⁶ = 21020045013337 is a prime.

It is a super-2 number, since 2×21020112122201² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21020112122201.

It is not an unprimeable number, because it can be changed into a prime (21020112122231) 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, 90123005 + ... + 90355941.

It is an arithmetic number, because the mean of its divisors is an integer number (2630270673360).

Almost surely, 2^{21020112122201} is an apocalyptic number.

It is an amenable number.

21020112122201 is a deficient number, since it is larger than the sum of its proper divisors (22053264679).

21020112122201 is an equidigital number, since it uses as much as digits as its factorization.

21020112122201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327223.

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

Adding to 21020112122201 its reverse (10222121102012), we get a palindrome (31242233224213).

The spelling of 21020112122201 in words is "twenty-one trillion, twenty billion, one hundred twelve million, one hundred twenty-two thousand, two hundred one".