1211424505723 has 2 divisors, whose sum is σ = 1211424505724. Its totient is φ = 1211424505722.

The previous prime is 1211424505717. The next prime is 1211424505787. The reversal of 1211424505723 is 3275054241121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1211424505723 - 2²⁹ = 1210887634811 is a prime.

It is a super-3 number, since 3×1211424505723³ (a number of 37 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1211424505223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605712252861 + 605712252862.

It is an arithmetic number, because the mean of its divisors is an integer number (605712252862).

Almost surely, 2^{1211424505723} is an apocalyptic number.

1211424505723 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211424505723 is an equidigital number, since it uses as much as digits as its factorization.

1211424505723 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 67200, while the sum is 37.

Adding to 1211424505723 its reverse (3275054241121), we get a palindrome (4486478746844).

The spelling of 1211424505723 in words is "one trillion, two hundred eleven billion, four hundred twenty-four million, five hundred five thousand, seven hundred twenty-three".