220001221001001 has 64 divisors (see below), whose sum is σ = 331939802287872. Its totient is φ = 128432304000000.

The previous prime is 220001221000997. The next prime is 220001221001011. The reversal of 220001221001001 is 100100122100022.

It is not a de Polignac number, because 220001221001001 - 2² = 220001221000997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220001221001011) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1220911131 + ... + 1221091311.

It is an arithmetic number, because the mean of its divisors is an integer number (5186559410748).

Almost surely, 2^{220001221001001} is an apocalyptic number.

It is an amenable number.

220001221001001 is a deficient number, since it is larger than the sum of its proper divisors (111938581286871).

220001221001001 is a wasteful number, since it uses less digits than its factorization.

220001221001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190234.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 220001221001001 its reverse (100100122100022), we get a palindrome (320101343101023).

The spelling of 220001221001001 in words is "two hundred twenty trillion, one billion, two hundred twenty-one million, one thousand, one".