121121220102251 has 2 divisors, whose sum is σ = 121121220102252. Its totient is φ = 121121220102250.

The previous prime is 121121220102227. The next prime is 121121220102257. The reversal of 121121220102251 is 152201022121121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121121220102251 - 2¹⁴ = 121121220085867 is a prime.

It is not a weakly prime, because it can be changed into another prime (121121220102257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60560610051125 + 60560610051126.

It is an arithmetic number, because the mean of its divisors is an integer number (60560610051126).

Almost surely, 2^{121121220102251} is an apocalyptic number.

121121220102251 is a deficient number, since it is larger than the sum of its proper divisors (1).

121121220102251 is an equidigital number, since it uses as much as digits as its factorization.

121121220102251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 23.

Adding to 121121220102251 its reverse (152201022121121), we get a palindrome (273322242223372).

The spelling of 121121220102251 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, two hundred twenty million, one hundred two thousand, two hundred fifty-one".