1211203379 has 2 divisors, whose sum is σ = 1211203380. Its totient is φ = 1211203378.

The previous prime is 1211203309. The next prime is 1211203397. The reversal of 1211203379 is 9733021121.

Together with next prime (1211203397) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211203379 is a prime.

It is not a weakly prime, because it can be changed into another prime (1211203309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605601689 + 605601690.

It is an arithmetic number, because the mean of its divisors is an integer number (605601690).

Almost surely, 2^1211203379 is an apocalyptic number.

1211203379 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211203379 is an equidigital number, since it uses as much as digits as its factorization.

1211203379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 1211203379 is about 34802.3473202599. The cubic root of 1211203379 is about 1065.9553768456.

The spelling of 1211203379 in words is "one billion, two hundred eleven million, two hundred three thousand, three hundred seventy-nine".