221201211112122 has 32 divisors (see below), whose sum is σ = 446965225124544. Its totient is φ = 72973276531200.

The previous prime is 221201211112093. The next prime is 221201211112129. The reversal of 221201211112122 is 221211112102122.

It is not an unprimeable number, because it can be changed into a prime (221201211112129) 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, 158810097 + ... + 160196907.

It is an arithmetic number, because the mean of its divisors is an integer number (13967663285142).

Almost surely, 2^{221201211112122} is an apocalyptic number.

221201211112122 is an abundant number, since it is smaller than the sum of its proper divisors (225764014012422).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221201211112122 is a wasteful number, since it uses less digits than its factorization.

221201211112122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1660974.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 221201211112122 its reverse (221211112102122), we get a palindrome (442412323214244).

The spelling of 221201211112122 in words is "two hundred twenty-one trillion, two hundred one billion, two hundred eleven million, one hundred twelve thousand, one hundred twenty-two".