221001121122011 has 4 divisors (see below), whose sum is σ = 221096751207024. Its totient is φ = 220905491037000.

The previous prime is 221001121121993. The next prime is 221001121122013. The reversal of 221001121122011 is 110221121100122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221001121122011 - 2¹⁰ = 221001121120987 is a prime.

It is a super-3 number, since 3×221001121122011³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221001121122013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47815039040 + ... + 47815043661.

It is an arithmetic number, because the mean of its divisors is an integer number (55274187801756).

Almost surely, 2^{221001121122011} is an apocalyptic number.

221001121122011 is a deficient number, since it is larger than the sum of its proper divisors (95630085013).

221001121122011 is an equidigital number, since it uses as much as digits as its factorization.

221001121122011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95630085012.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 221001121122011 its reverse (110221121100122), we get a palindrome (331222242222133).

The spelling of 221001121122011 in words is "two hundred twenty-one trillion, one billion, one hundred twenty-one million, one hundred twenty-two thousand, eleven".