1212973019 has 2 divisors, whose sum is σ = 1212973020. Its totient is φ = 1212973018.

The previous prime is 1212973009. The next prime is 1212973033. The reversal of 1212973019 is 9103792121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212973019 is a prime.

It is a super-2 number, since 2×1212973019² = 2942607089643948722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1212973019.

It is not a weakly prime, because it can be changed into another prime (1212973009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606486509 + 606486510.

It is an arithmetic number, because the mean of its divisors is an integer number (606486510).

Almost surely, 2^1212973019 is an apocalyptic number.

1212973019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212973019 is an equidigital number, since it uses as much as digits as its factorization.

1212973019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 1212973019 is about 34827.7621876571. The cubic root of 1212973019 is about 1066.4742655688.

The spelling of 1212973019 in words is "one billion, two hundred twelve million, nine hundred seventy-three thousand, nineteen".