121000227221 has 2 divisors, whose sum is σ = 121000227222. Its totient is φ = 121000227220.

The previous prime is 121000227197. The next prime is 121000227251. The reversal of 121000227221 is 122722000121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119401347025 + 1598880196 = 345545^2 + 39986^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121000227221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121000227193 and 121000227202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121000227251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60500113610 + 60500113611.

It is an arithmetic number, because the mean of its divisors is an integer number (60500113611).

Almost surely, 2^121000227221 is an apocalyptic number.

It is an amenable number.

121000227221 is a deficient number, since it is larger than the sum of its proper divisors (1).

121000227221 is an equidigital number, since it uses as much as digits as its factorization.

121000227221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 20.

Adding to 121000227221 its reverse (122722000121), we get a palindrome (243722227342).

The spelling of 121000227221 in words is "one hundred twenty-one billion, two hundred twenty-seven thousand, two hundred twenty-one".