222201221212021 has 4 divisors (see below), whose sum is σ = 227620763192844. Its totient is φ = 216781679231200.

The previous prime is 222201221212013. The next prime is 222201221212027. The reversal of 222201221212021 is 120212122102222.

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 47043672427921 + 175157548784100 = 6858839^2 + 13234710^2 .

It is a cyclic number.

It is not a de Polignac number, because 222201221212021 - 2³ = 222201221212013 is a prime.

It is a super-3 number, since 3×222201221212021³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222201221211983 and 222201221212001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222201221212027) 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, 2709770990350 + ... + 2709770990431.

It is an arithmetic number, because the mean of its divisors is an integer number (56905190798211).

Almost surely, 2^{222201221212021} is an apocalyptic number.

It is an amenable number.

222201221212021 is a deficient number, since it is larger than the sum of its proper divisors (5419541980823).

222201221212021 is an equidigital number, since it uses as much as digits as its factorization.

222201221212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5419541980822.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 222201221212021 its reverse (120212122102222), we get a palindrome (342413343314243).

The spelling of 222201221212021 in words is "two hundred twenty-two trillion, two hundred one billion, two hundred twenty-one million, two hundred twelve thousand, twenty-one".