121111000202221 has 2 divisors, whose sum is σ = 121111000202222. Its totient is φ = 121111000202220.

The previous prime is 121111000202167. The next prime is 121111000202251. The reversal of 121111000202221 is 122202000111121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121109782890121 + 1217312100 = 11004989^2 + 34890^2 .

It is a cyclic number.

It is not a de Polignac number, because 121111000202221 - 2¹¹ = 121111000200173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121111000202195 and 121111000202204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121111000202251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60555500101110 + 60555500101111.

It is an arithmetic number, because the mean of its divisors is an integer number (60555500101111).

Almost surely, 2^{121111000202221} is an apocalyptic number.

It is an amenable number.

121111000202221 is a deficient number, since it is larger than the sum of its proper divisors (1).

121111000202221 is an equidigital number, since it uses as much as digits as its factorization.

121111000202221 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 121111000202221 its reverse (122202000111121), we get a palindrome (243313000313342).

The spelling of 121111000202221 in words is "one hundred twenty-one trillion, one hundred eleven billion, two hundred two thousand, two hundred twenty-one".