1200012101251 has 2 divisors, whose sum is σ = 1200012101252. Its totient is φ = 1200012101250.

The previous prime is 1200012101207. The next prime is 1200012101291. The reversal of 1200012101251 is 1521012100021.

It is a strong prime.

It is an emirp because it is prime and its reverse (1521012100021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1200012101251 - 2¹⁹ = 1200011576963 is a prime.

It is not a weakly prime, because it can be changed into another prime (1200012101291) 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, 600006050625 + 600006050626.

It is an arithmetic number, because the mean of its divisors is an integer number (600006050626).

Almost surely, 2^{1200012101251} is an apocalyptic number.

1200012101251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200012101251 is an equidigital number, since it uses as much as digits as its factorization.

1200012101251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40, while the sum is 16.

Adding to 1200012101251 its reverse (1521012100021), we get a palindrome (2721024201272).

The spelling of 1200012101251 in words is "one trillion, two hundred billion, twelve million, one hundred one thousand, two hundred fifty-one".