221201021201011 has 4 divisors (see below), whose sum is σ = 221817180034800. Its totient is φ = 220584862367224.

The previous prime is 221201021200979. The next prime is 221201021201117. The reversal of 221201021201011 is 110102120102122.

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 221201021201011 - 2⁵ = 221201021200979 is a prime.

It is a super-3 number, since 3×221201021201011³ (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 (221201021204011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 308079416356 + ... + 308079417073.

It is an arithmetic number, because the mean of its divisors is an integer number (55454295008700).

Almost surely, 2^{221201021201011} is an apocalyptic number.

221201021201011 is a deficient number, since it is larger than the sum of its proper divisors (616158833789).

221201021201011 is an equidigital number, since it uses as much as digits as its factorization.

221201021201011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616158833788.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221201021201011 its reverse (110102120102122), we get a palindrome (331303141303133).

The spelling of 221201021201011 in words is "two hundred twenty-one trillion, two hundred one billion, twenty-one million, two hundred one thousand, eleven".