1242020203 has 2 divisors, whose sum is σ = 1242020204. Its totient is φ = 1242020202.

The previous prime is 1242020191. The next prime is 1242020233. The reversal of 1242020203 is 3020202421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1242020203 - 2²⁵ = 1208465771 is a prime.

It is a super-2 number, since 2×1242020203² = 3085228369320322418, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1242020233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621010101 + 621010102.

It is an arithmetic number, because the mean of its divisors is an integer number (621010102).

Almost surely, 2^1242020203 is an apocalyptic number.

1242020203 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242020203 is an equidigital number, since it uses as much as digits as its factorization.

1242020203 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 16.

The square root of 1242020203 is about 35242.3070045081. The cubic root of 1242020203 is about 1074.9201896400.

Adding to 1242020203 its reverse (3020202421), we get a palindrome (4262222624).

It can be divided in two parts, 12420 and 20203, that added together give a palindrome (32623).

The spelling of 1242020203 in words is "one billion, two hundred forty-two million, twenty thousand, two hundred three".