220020121001 has 4 divisors (see below), whose sum is σ = 223304003472. Its totient is φ = 216736238532.

The previous prime is 220020120997. The next prime is 220020121031. The reversal of 220020121001 is 100121020022.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 220020121001 - 2² = 220020120997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220020121031) 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, 1641941135 + ... + 1641941268.

It is an arithmetic number, because the mean of its divisors is an integer number (55826000868).

Almost surely, 2^220020121001 is an apocalyptic number.

It is an amenable number.

220020121001 is a deficient number, since it is larger than the sum of its proper divisors (3283882471).

220020121001 is an equidigital number, since it uses as much as digits as its factorization.

220020121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3283882470.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 220020121001 its reverse (100121020022), we get a palindrome (320141141023).

The spelling of 220020121001 in words is "two hundred twenty billion, twenty million, one hundred twenty-one thousand, one".