221121200010001 has 16 divisors (see below), whose sum is σ = 235538124618240. Its totient is φ = 206863913721600.

The previous prime is 221121200009999. The next prime is 221121200010019. The reversal of 221121200010001 is 100010002121122.

It is a cyclic number.

It is not a de Polignac number, because 221121200010001 - 2¹ = 221121200009999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221121200050001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44424175 + ... + 49150276.

It is an arithmetic number, because the mean of its divisors is an integer number (14721132788640).

Almost surely, 2^{221121200010001} is an apocalyptic number.

It is an amenable number.

221121200010001 is a deficient number, since it is larger than the sum of its proper divisors (14416924608239).

221121200010001 is a wasteful number, since it uses less digits than its factorization.

221121200010001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93575304.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221121200010001 its reverse (100010002121122), we get a palindrome (321131202131123).

The spelling of 221121200010001 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, two hundred million, ten thousand, one".