220001202121001 has 24 divisors (see below), whose sum is σ = 262165858869600. Its totient is φ = 183970220078400.

The previous prime is 220001202120989. The next prime is 220001202121003. The reversal of 220001202121001 is 100121202100022.

It is not a de Polignac number, because 220001202121001 - 2¹⁸ = 220001201858857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220001202121003) 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, 131155886 + ... + 132822696.

It is an arithmetic number, because the mean of its divisors is an integer number (10923577452900).

Almost surely, 2^{220001202121001} is an apocalyptic number.

It is an amenable number.

220001202121001 is a deficient number, since it is larger than the sum of its proper divisors (42164656748599).

220001202121001 is a wasteful number, since it uses less digits than its factorization.

220001202121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1732565 (or 1732558 counting only the distinct ones).

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

Adding to 220001202121001 its reverse (100121202100022), we get a palindrome (320122404221023).

The spelling of 220001202121001 in words is "two hundred twenty trillion, one billion, two hundred two million, one hundred twenty-one thousand, one".