222111210011021 has 6 divisors (see below), whose sum is σ = 229507212842766. Its totient is φ = 214946332267800.

The previous prime is 222111210010993. The next prime is 222111210011057. The reversal of 222111210011021 is 120110012111222.

It can be written as a sum of positive squares in only one way, i.e., 161066912793796 + 61044297217225 = 12691214^2 + 7813085^2 .

It is a de Polignac number, because none of the positive numbers 2^k-222111210011021 is a prime.

It is a super-2 number, since 2×222111210011021² (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 (222111210011081) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 115562543270 + ... + 115562545191.

It is an arithmetic number, because the mean of its divisors is an integer number (38251202140461).

Almost surely, 2^{222111210011021} is an apocalyptic number.

It is an amenable number.

222111210011021 is a deficient number, since it is larger than the sum of its proper divisors (7396002831745).

222111210011021 is an equidigital number, since it uses as much as digits as its factorization.

222111210011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231125088523 (or 231125088492 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 222111210011021 its reverse (120110012111222), we get a palindrome (342221222122243).

The spelling of 222111210011021 in words is "two hundred twenty-two trillion, one hundred eleven billion, two hundred ten million, eleven thousand, twenty-one".