1212691356047 has 2 divisors, whose sum is σ = 1212691356048. Its totient is φ = 1212691356046.

The previous prime is 1212691355977. The next prime is 1212691356049. The reversal of 1212691356047 is 7406531962121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1212691356047 - 2¹⁶ = 1212691290511 is a prime.

It is a super-2 number, since 2×1212691356047² (a number of 25 digits) contains 22 as substring.

Together with 1212691356049, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1212691355992 and 1212691356010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212691356049) 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, 606345678023 + 606345678024.

It is an arithmetic number, because the mean of its divisors is an integer number (606345678024).

Almost surely, 2^{1212691356047} is an apocalyptic number.

1212691356047 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212691356047 is an equidigital number, since it uses as much as digits as its factorization.

1212691356047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 47.

The spelling of 1212691356047 in words is "one trillion, two hundred twelve billion, six hundred ninety-one million, three hundred fifty-six thousand, forty-seven".