221121012202201 has 16 divisors (see below), whose sum is σ = 225567114393600. Its totient is φ = 216698746013568.

The previous prime is 221121012202163. The next prime is 221121012202213. The reversal of 221121012202201 is 102202210121122.

It is a cyclic number.

It is not a de Polignac number, because 221121012202201 - 2¹⁵ = 221121012169433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221121012202231) 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, 43437925 + ... + 48260701.

It is an arithmetic number, because the mean of its divisors is an integer number (14097944649600).

Almost surely, 2^{221121012202201} is an apocalyptic number.

It is an amenable number.

221121012202201 is a deficient number, since it is larger than the sum of its proper divisors (4446102191399).

221121012202201 is a wasteful number, since it uses less digits than its factorization.

221121012202201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4825248.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221121012202201 its reverse (102202210121122), we get a palindrome (323323222323323).

The spelling of 221121012202201 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, twelve million, two hundred two thousand, two hundred one".