1122420243 has 16 divisors (see below), whose sum is σ = 1710823680. Its totient is φ = 641207136.

The previous prime is 1122420239. The next prime is 1122420283. The reversal of 1122420243 is 3420242211.

It is not a de Polignac number, because 1122420243 - 2² = 1122420239 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1122420283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139453 + ... + 147281.

It is an arithmetic number, because the mean of its divisors is an integer number (106926480).

Almost surely, 2^1122420243 is an apocalyptic number.

1122420243 is a deficient number, since it is larger than the sum of its proper divisors (588403437).

1122420243 is an equidigital number, since it uses as much as digits as its factorization.

1122420243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14666.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1122420243 is about 33502.5408439420. The cubic root of 1122420243 is about 1039.2463237121.

Adding to 1122420243 its reverse (3420242211), we get a palindrome (4542662454).

The spelling of 1122420243 in words is "one billion, one hundred twenty-two million, four hundred twenty thousand, two hundred forty-three".