221220001011 has 8 divisors (see below), whose sum is σ = 298513736640. Its totient is φ = 145703133032.

The previous prime is 221220001003. The next prime is 221220001027. The reversal of 221220001011 is 110100022122.

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 221220001011 - 2³ = 221220001003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221220005011) 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, 444216621 + ... + 444217118.

It is an arithmetic number, because the mean of its divisors is an integer number (37314217080).

Almost surely, 2^221220001011 is an apocalyptic number.

221220001011 is a deficient number, since it is larger than the sum of its proper divisors (77293735629).

221220001011 is an equidigital number, since it uses as much as digits as its factorization.

221220001011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888433825.

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

Adding to 221220001011 its reverse (110100022122), we get a palindrome (331320023133).

The spelling of 221220001011 in words is "two hundred twenty-one billion, two hundred twenty million, one thousand, eleven".