121112220020251 has 2 divisors, whose sum is σ = 121112220020252. Its totient is φ = 121112220020250.

The previous prime is 121112220020191. The next prime is 121112220020257. The reversal of 121112220020251 is 152020022211121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121112220020251 - 2³⁹ = 120562464206363 is a prime.

It is not a weakly prime, because it can be changed into another prime (121112220020257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60556110010125 + 60556110010126.

It is an arithmetic number, because the mean of its divisors is an integer number (60556110010126).

Almost surely, 2^{121112220020251} is an apocalyptic number.

121112220020251 is a deficient number, since it is larger than the sum of its proper divisors (1).

121112220020251 is an equidigital number, since it uses as much as digits as its factorization.

121112220020251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320, while the sum is 22.

Adding to 121112220020251 its reverse (152020022211121), we get a palindrome (273132242231372).

The spelling of 121112220020251 in words is "one hundred twenty-one trillion, one hundred twelve billion, two hundred twenty million, twenty thousand, two hundred fifty-one".