220001201001121 has 4 divisors (see below), whose sum is σ = 232942448118852. Its totient is φ = 207059953883392.

The previous prime is 220001201001079. The next prime is 220001201001137. The reversal of 220001201001121 is 121100102100022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 150860911677025 + 69140289324096 = 12282545^2 + 8315064^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220001201001121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220001201001721) 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, 6470623558840 + ... + 6470623558873.

It is an arithmetic number, because the mean of its divisors is an integer number (58235612029713).

Almost surely, 2^{220001201001121} is an apocalyptic number.

It is an amenable number.

220001201001121 is a deficient number, since it is larger than the sum of its proper divisors (12941247117731).

220001201001121 is a wasteful number, since it uses less digits than its factorization.

220001201001121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12941247117730.

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

Adding to 220001201001121 its reverse (121100102100022), we get a palindrome (341101303101143).

The spelling of 220001201001121 in words is "two hundred twenty trillion, one billion, two hundred one million, one thousand, one hundred twenty-one".