1215412120051 has 2 divisors, whose sum is σ = 1215412120052. Its totient is φ = 1215412120050.

The previous prime is 1215412119989. The next prime is 1215412120061. The reversal of 1215412120051 is 1500212145121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1215412120051 - 2¹⁷ = 1215411988979 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1215412119998 and 1215412120025.

It is not a weakly prime, because it can be changed into another prime (1215412120061) 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, 607706060025 + 607706060026.

It is an arithmetic number, because the mean of its divisors is an integer number (607706060026).

Almost surely, 2^{1215412120051} is an apocalyptic number.

1215412120051 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215412120051 is an equidigital number, since it uses as much as digits as its factorization.

1215412120051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 800, while the sum is 25.

Adding to 1215412120051 its reverse (1500212145121), we get a palindrome (2715624265172).

The spelling of 1215412120051 in words is "one trillion, two hundred fifteen billion, four hundred twelve million, one hundred twenty thousand, fifty-one".