221201011121101 has 16 divisors (see below), whose sum is σ = 248297505815808. Its totient is φ = 195344200792000.

The previous prime is 221201011120961. The next prime is 221201011121117. The reversal of 221201011121101 is 101121110102122.

It is a cyclic number.

It is not a de Polignac number, because 221201011121101 - 2¹³ = 221201011112909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221201011121131) 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, 1878250741 + ... + 1878368506.

It is an arithmetic number, because the mean of its divisors is an integer number (15518594113488).

Almost surely, 2^{221201011121101} is an apocalyptic number.

It is an amenable number.

221201011121101 is a deficient number, since it is larger than the sum of its proper divisors (27096494694707).

221201011121101 is a wasteful number, since it uses less digits than its factorization.

221201011121101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3756619412.

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

Adding to 221201011121101 its reverse (101121110102122), we get a palindrome (322322121223223).

The spelling of 221201011121101 in words is "two hundred twenty-one trillion, two hundred one billion, eleven million, one hundred twenty-one thousand, one hundred one".