121310254422221 has 2 divisors, whose sum is σ = 121310254422222. Its totient is φ = 121310254422220.

The previous prime is 121310254422179. The next prime is 121310254422223. The reversal of 121310254422221 is 122224452013121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88105162009225 + 33205092412996 = 9386435^2 + 5762386^2 .

It is a cyclic number.

It is not a de Polignac number, because 121310254422221 - 2⁴² = 116912207911117 is a prime.

Together with 121310254422223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121310254422223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60655127211110 + 60655127211111.

It is an arithmetic number, because the mean of its divisors is an integer number (60655127211111).

Almost surely, 2^{121310254422221} is an apocalyptic number.

It is an amenable number.

121310254422221 is a deficient number, since it is larger than the sum of its proper divisors (1).

121310254422221 is an equidigital number, since it uses as much as digits as its factorization.

121310254422221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15360, while the sum is 32.

The spelling of 121310254422221 in words is "one hundred twenty-one trillion, three hundred ten billion, two hundred fifty-four million, four hundred twenty-two thousand, two hundred twenty-one".