2222122100021 has 8 divisors (see below), whose sum is σ = 2227724040984. Its totient is φ = 2216520460800.

The previous prime is 2222122099979. The next prime is 2222122100047. The reversal of 2222122100021 is 1200012212222.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 881364216100 + 1340757883921 = 938810^2 + 1157911^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2222122100021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2222122100921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25754465 + ... + 25840601.

It is an arithmetic number, because the mean of its divisors is an integer number (278465505123).

Almost surely, 2^{2222122100021} is an apocalyptic number.

It is an amenable number.

2222122100021 is a deficient number, since it is larger than the sum of its proper divisors (5601940963).

2222122100021 is an equidigital number, since it uses as much as digits as its factorization.

2222122100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150871.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 2222122100021 its reverse (1200012212222), we get a palindrome (3422134312243).

The spelling of 2222122100021 in words is "two trillion, two hundred twenty-two billion, one hundred twenty-two million, one hundred thousand, twenty-one".