222221110211021 has 8 divisors (see below), whose sum is σ = 239732429662584. Its totient is φ = 205203067363840.

The previous prime is 222221110210991. The next prime is 222221110211057. The reversal of 222221110211021 is 120112011122222.

It can be written as a sum of positive squares in 4 ways, for example, as 20643982909225 + 201577127301796 = 4543565^2 + 14197786^2 .

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 222221110211021 - 2²² = 222221106016717 is a prime.

It is a super-2 number, since 2×222221110211021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222221110210984 and 222221110211002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222221110211071) 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, 123319150160 + ... + 123319151961.

It is an arithmetic number, because the mean of its divisors is an integer number (29966553707823).

Almost surely, 2^{222221110211021} is an apocalyptic number.

It is an amenable number.

222221110211021 is a deficient number, since it is larger than the sum of its proper divisors (17511319451563).

222221110211021 is a wasteful number, since it uses less digits than its factorization.

222221110211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246638302191.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 222221110211021 its reverse (120112011122222), we get a palindrome (342333121333243).

The spelling of 222221110211021 in words is "two hundred twenty-two trillion, two hundred twenty-one billion, one hundred ten million, two hundred eleven thousand, twenty-one".