220121001001 has 8 divisors (see below), whose sum is σ = 240621074208. Its totient is φ = 199702440000.

The previous prime is 220121000929. The next prime is 220121001011. The reversal of 220121001001 is 100100121022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 220121001001 - 2¹⁹ = 220120476713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220121001011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20372400 + ... + 20383201.

It is an arithmetic number, because the mean of its divisors is an integer number (30077634276).

Almost surely, 2^220121001001 is an apocalyptic number.

It is an amenable number.

220121001001 is a deficient number, since it is larger than the sum of its proper divisors (20500073207).

220121001001 is a wasteful number, since it uses less digits than its factorization.

220121001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40756103.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 220121001001 its reverse (100100121022), we get a palindrome (320221122023).

The spelling of 220121001001 in words is "two hundred twenty billion, one hundred twenty-one million, one thousand, one".