1212123247 has 2 divisors, whose sum is σ = 1212123248. Its totient is φ = 1212123246.

The previous prime is 1212123223. The next prime is 1212123271. The reversal of 1212123247 is 7423212121.

It is a balanced prime because it is at equal distance from previous prime (1212123223) and next prime (1212123271).

It is a cyclic number.

It is not a de Polignac number, because 1212123247 - 2¹⁵ = 1212090479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212123277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606061623 + 606061624.

It is an arithmetic number, because the mean of its divisors is an integer number (606061624).

Almost surely, 2^1212123247 is an apocalyptic number.

1212123247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212123247 is an equidigital number, since it uses as much as digits as its factorization.

1212123247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344, while the sum is 25.

The square root of 1212123247 is about 34815.5604148490. The cubic root of 1212123247 is about 1066.2251609115.

Adding to 1212123247 its reverse (7423212121), we get a palindrome (8635335368).

The spelling of 1212123247 in words is "one billion, two hundred twelve million, one hundred twenty-three thousand, two hundred forty-seven".