1011202021243 has 2 divisors, whose sum is σ = 1011202021244. Its totient is φ = 1011202021242.

The previous prime is 1011202021097. The next prime is 1011202021307. The reversal of 1011202021243 is 3421202021101.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011202021243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1011202021243.

It is not a weakly prime, because it can be changed into another prime (1011202021343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505601010621 + 505601010622.

It is an arithmetic number, because the mean of its divisors is an integer number (505601010622).

Almost surely, 2^{1011202021243} is an apocalyptic number.

1011202021243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011202021243 is an equidigital number, since it uses as much as digits as its factorization.

1011202021243 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 19.

Adding to 1011202021243 its reverse (3421202021101), we get a palindrome (4432404042344).

The spelling of 1011202021243 in words is "one trillion, eleven billion, two hundred two million, twenty-one thousand, two hundred forty-three".