1111010222221 has 2 divisors, whose sum is σ = 1111010222222. Its totient is φ = 1111010222220.

The previous prime is 1111010222209. The next prime is 1111010222239. The reversal of 1111010222221 is 1222220101111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1029636384100 + 81373838121 = 1014710^2 + 285261^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111010222221 - 2²⁵ = 1110976667789 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1111010222195 and 1111010222204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111010222821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555505111110 + 555505111111.

It is an arithmetic number, because the mean of its divisors is an integer number (555505111111).

Almost surely, 2^{1111010222221} is an apocalyptic number.

It is an amenable number.

1111010222221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111010222221 is an equidigital number, since it uses as much as digits as its factorization.

1111010222221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1111010222221 its reverse (1222220101111), we get a palindrome (2333230323332).

The spelling of 1111010222221 in words is "one trillion, one hundred eleven billion, ten million, two hundred twenty-two thousand, two hundred twenty-one".