21120221202222 has 16 divisors (see below), whose sum is σ = 42240957708240. Its totient is φ = 7039987850112.

The previous prime is 21120221202211. The next prime is 21120221202233. The reversal of 21120221202222 is 22220212202112.

It is an interprime number because it is at equal distance from previous prime (21120221202211) and next prime (21120221202233).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20937153 + ... + 21922700.

It is an arithmetic number, because the mean of its divisors is an integer number (2640059856765).

Almost surely, 2^{21120221202222} is an apocalyptic number.

21120221202222 is an abundant number, since it is smaller than the sum of its proper divisors (21120736506018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21120221202222 is a wasteful number, since it uses less digits than its factorization.

21120221202222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42941987.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 21120221202222 its reverse (22220212202112), we get a palindrome (43340433404334).

The spelling of 21120221202222 in words is "twenty-one trillion, one hundred twenty billion, two hundred twenty-one million, two hundred two thousand, two hundred twenty-two".