222121001022001 has 8 divisors (see below), whose sum is σ = 224338739054184. Its totient is φ = 219903626131200.

The previous prime is 222121001021993. The next prime is 222121001022049. The reversal of 222121001022001 is 100220100121222.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 151488070186401 + 70632930835600 = 12308049^2 + 8404340^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 222121001022001 - 2³ = 222121001021993 is a prime.

It is a super-3 number, since 3×222121001022001³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222121001022061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89555826 + ... + 92002651.

It is an arithmetic number, because the mean of its divisors is an integer number (28042342381773).

Almost surely, 2^{222121001022001} is an apocalyptic number.

It is an amenable number.

222121001022001 is a deficient number, since it is larger than the sum of its proper divisors (2217738032183).

222121001022001 is a wasteful number, since it uses less digits than its factorization.

222121001022001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181570691.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 222121001022001 its reverse (100220100121222), we get a palindrome (322341101143223).

The spelling of 222121001022001 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, one million, twenty-two thousand, one".