221201101201011 has 16 divisors (see below), whose sum is σ = 304450522364928. Its totient is φ = 142709593384800.

The previous prime is 221201101201009. The next prime is 221201101201079. The reversal of 221201101201011 is 110102101102122.

It is a happy number.

It is not a de Polignac number, because 221201101201011 - 2¹ = 221201101201009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221201101201511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10408525 + ... + 23467841.

It is an arithmetic number, because the mean of its divisors is an integer number (19028157647808).

Almost surely, 2^{221201101201011} is an apocalyptic number.

221201101201011 is a deficient number, since it is larger than the sum of its proper divisors (83249421163917).

221201101201011 is a wasteful number, since it uses less digits than its factorization.

221201101201011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13241482.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 221201101201011 its reverse (110102101102122), we get a palindrome (331303202303133).

The spelling of 221201101201011 in words is "two hundred twenty-one trillion, two hundred one billion, one hundred one million, two hundred one thousand, eleven".