1212320623 has 2 divisors, whose sum is σ = 1212320624. Its totient is φ = 1212320622.

The previous prime is 1212320621. The next prime is 1212320633. The reversal of 1212320623 is 3260232121.

It is a weak prime.

It is an emirp because it is prime and its reverse (3260232121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1212320623 - 2¹ = 1212320621 is a prime.

It is a super-2 number, since 2×1212320623² = 2939442585902216258, which contains 22 as substring.

Together with 1212320621, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1212320594 and 1212320603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212320621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606160311 + 606160312.

It is an arithmetic number, because the mean of its divisors is an integer number (606160312).

Almost surely, 2^1212320623 is an apocalyptic number.

1212320623 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212320623 is an equidigital number, since it uses as much as digits as its factorization.

1212320623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 1212320623 is about 34818.3948940786. The cubic root of 1212320623 is about 1066.2830306691.

Adding to 1212320623 its reverse (3260232121), we get a palindrome (4472552744).

The spelling of 1212320623 in words is "one billion, two hundred twelve million, three hundred twenty thousand, six hundred twenty-three".