21200122021001 has 24 divisors (see below), whose sum is σ = 26998373725344. Its totient is φ = 16461202423680.

The previous prime is 21200122020997. The next prime is 21200122021021. The reversal of 21200122021001 is 10012022100212.

It is not a de Polignac number, because 21200122021001 - 2² = 21200122020997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21200122021021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69339200 + ... + 69644273.

It is an arithmetic number, because the mean of its divisors is an integer number (1124932238556).

Almost surely, 2^{21200122021001} is an apocalyptic number.

It is an amenable number.

21200122021001 is a deficient number, since it is larger than the sum of its proper divisors (5798251704343).

21200122021001 is a wasteful number, since it uses less digits than its factorization.

21200122021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138983781 (or 138983774 counting only the distinct ones).

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

Adding to 21200122021001 its reverse (10012022100212), we get a palindrome (31212144121213).

The spelling of 21200122021001 in words is "twenty-one trillion, two hundred billion, one hundred twenty-two million, twenty-one thousand, one".