111013021211221 has 2 divisors, whose sum is σ = 111013021211222. Its totient is φ = 111013021211220.

The previous prime is 111013021211179. The next prime is 111013021211227. The reversal of 111013021211221 is 122112120310111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70359466683025 + 40653554528196 = 8388055^2 + 6376014^2 .

It is a cyclic number.

It is not a de Polignac number, because 111013021211221 - 2²¹ = 111013019114069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111013021211227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55506510605610 + 55506510605611.

It is an arithmetic number, because the mean of its divisors is an integer number (55506510605611).

Almost surely, 2^{111013021211221} is an apocalyptic number.

It is an amenable number.

111013021211221 is a deficient number, since it is larger than the sum of its proper divisors (1).

111013021211221 is an equidigital number, since it uses as much as digits as its factorization.

111013021211221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 111013021211221 its reverse (122112120310111), we get a palindrome (233125141521332).

The spelling of 111013021211221 in words is "one hundred eleven trillion, thirteen billion, twenty-one million, two hundred eleven thousand, two hundred twenty-one".