220121221001 has 16 divisors (see below), whose sum is σ = 241033822848. Its totient is φ = 199360224000.

The previous prime is 220121220953. The next prime is 220121221003. The reversal of 220121221001 is 100122121022.

It is a cyclic number.

It is not a de Polignac number, because 220121221001 - 2⁶ = 220121220937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220121221003) 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, 3305900 + ... + 3371826.

It is an arithmetic number, because the mean of its divisors is an integer number (15064613928).

Almost surely, 2^220121221001 is an apocalyptic number.

It is an amenable number.

220121221001 is a deficient number, since it is larger than the sum of its proper divisors (20912601847).

220121221001 is a wasteful number, since it uses less digits than its factorization.

220121221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67072.

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

Adding to 220121221001 its reverse (100122121022), we get a palindrome (320243342023).

The spelling of 220121221001 in words is "two hundred twenty billion, one hundred twenty-one million, two hundred twenty-one thousand, one".