121101221251 has 2 divisors, whose sum is σ = 121101221252. Its totient is φ = 121101221250.

The previous prime is 121101221239. The next prime is 121101221257. The reversal of 121101221251 is 152122101121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121101221251 - 2²¹ = 121099124099 is a prime.

It is not a weakly prime, because it can be changed into another prime (121101221257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60550610625 + 60550610626.

It is an arithmetic number, because the mean of its divisors is an integer number (60550610626).

Almost surely, 2^121101221251 is an apocalyptic number.

121101221251 is a deficient number, since it is larger than the sum of its proper divisors (1).

121101221251 is an equidigital number, since it uses as much as digits as its factorization.

121101221251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80, while the sum is 19.

Adding to 121101221251 its reverse (152122101121), we get a palindrome (273223322372).

The spelling of 121101221251 in words is "one hundred twenty-one billion, one hundred one million, two hundred twenty-one thousand, two hundred fifty-one".