220121111111001 has 16 divisors (see below), whose sum is σ = 294440119480320. Its totient is φ = 146274931622160.

The previous prime is 220121111110997. The next prime is 220121111111021. The reversal of 220121111111001 is 100111111121022.

It is not a de Polignac number, because 220121111111001 - 2² = 220121111110997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220121111111021) 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, 17077941 + ... + 27053618.

It is an arithmetic number, because the mean of its divisors is an integer number (18402507467520).

Almost surely, 2^{220121111111001} is an apocalyptic number.

It is an amenable number.

220121111111001 is a deficient number, since it is larger than the sum of its proper divisors (74319008369319).

220121111111001 is a wasteful number, since it uses less digits than its factorization.

220121111111001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44136916.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 220121111111001 its reverse (100111111121022), we get a palindrome (320232222232023).

The spelling of 220121111111001 in words is "two hundred twenty trillion, one hundred twenty-one billion, one hundred eleven million, one hundred eleven thousand, one".