221220201201201 has 6 divisors (see below), whose sum is σ = 319540290623970. Its totient is φ = 147480134134128.

The previous prime is 221220201201151. The next prime is 221220201201217. The reversal of 221220201201201 is 102102102022122.

It is a happy number.

221220201201201 is a `hidden beast` number, since 2 + 21 + 220 + 20 + 1 + 201 + 201 = 666.

221220201201201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 134577632577600 + 86642568623601 = 11600760^2 + 9308199^2 .

It is not a de Polignac number, because 221220201201201 - 2¹⁴ = 221220201184817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221220201201221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12290011177836 + ... + 12290011177853.

It is an arithmetic number, because the mean of its divisors is an integer number (53256715103995).

Almost surely, 2^{221220201201201} is an apocalyptic number.

It is an amenable number.

221220201201201 is a deficient number, since it is larger than the sum of its proper divisors (98320089422769).

221220201201201 is a wasteful number, since it uses less digits than its factorization.

221220201201201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24580022355695 (or 24580022355692 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 221220201201201 its reverse (102102102022122), we get a palindrome (323322303223323).

The spelling of 221220201201201 in words is "two hundred twenty-one trillion, two hundred twenty billion, two hundred one million, two hundred one thousand, two hundred one".