222012110201221 has 4 divisors (see below), whose sum is σ = 222012171893772. Its totient is φ = 222012048508672.

The previous prime is 222012110201209. The next prime is 222012110201227. The reversal of 222012110201221 is 122102011210222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 215668315922500 + 6343794278721 = 14685650^2 + 2518689^2 .

It is a cyclic number.

It is not a de Polignac number, because 222012110201221 - 2³³ = 222003520266629 is a prime.

It is a super-2 number, since 2×222012110201221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222012110201227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25090210 + ... + 32764963.

It is an arithmetic number, because the mean of its divisors is an integer number (55503042973443).

Almost surely, 2^{222012110201221} is an apocalyptic number.

It is an amenable number.

222012110201221 is a deficient number, since it is larger than the sum of its proper divisors (61692551).

222012110201221 is an equidigital number, since it uses as much as digits as its factorization.

222012110201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61692550.

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

Adding to 222012110201221 its reverse (122102011210222), we get a palindrome (344114121411443).

The spelling of 222012110201221 in words is "two hundred twenty-two trillion, twelve billion, one hundred ten million, two hundred one thousand, two hundred twenty-one".