121212220212151 has 2 divisors, whose sum is σ = 121212220212152. Its totient is φ = 121212220212150.

The previous prime is 121212220212071. The next prime is 121212220212229. The reversal of 121212220212151 is 151212022212121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121212220212151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121212200212151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60606110106075 + 60606110106076.

It is an arithmetic number, because the mean of its divisors is an integer number (60606110106076).

Almost surely, 2^{121212220212151} is an apocalyptic number.

121212220212151 is a deficient number, since it is larger than the sum of its proper divisors (1).

121212220212151 is an equidigital number, since it uses as much as digits as its factorization.

121212220212151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 640, while the sum is 25.

Adding to 121212220212151 its reverse (151212022212121), we get a palindrome (272424242424272).

The spelling of 121212220212151 in words is "one hundred twenty-one trillion, two hundred twelve billion, two hundred twenty million, two hundred twelve thousand, one hundred fifty-one".