1202021243 has 2 divisors, whose sum is σ = 1202021244. Its totient is φ = 1202021242.

The previous prime is 1202021237. The next prime is 1202021297. The reversal of 1202021243 is 3421202021.

It is a weak prime.

It is an emirp because it is prime and its reverse (3421202021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1202021243 - 2¹⁶ = 1201955707 is a prime.

It is not a weakly prime, because it can be changed into another prime (1202020243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601010621 + 601010622.

It is an arithmetic number, because the mean of its divisors is an integer number (601010622).

Almost surely, 2^1202021243 is an apocalyptic number.

1202021243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202021243 is an equidigital number, since it uses as much as digits as its factorization.

1202021243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1202021243 is about 34670.1780064654. The cubic root of 1202021243 is about 1063.2548709533.

Adding to 1202021243 its reverse (3421202021), we get a palindrome (4623223264).

The spelling of 1202021243 in words is "one billion, two hundred two million, twenty-one thousand, two hundred forty-three".