1220202442 has 4 divisors (see below), whose sum is σ = 1830303666. Its totient is φ = 610101220.

The previous prime is 1220202433. The next prime is 1220202449. The reversal of 1220202442 is 2442020221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1213755921 + 6446521 = 34839^2 + 2539^2 .

It is not an unprimeable number, because it can be changed into a prime (1220202449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305050609 + ... + 305050612.

Almost surely, 2^1220202442 is an apocalyptic number.

1220202442 is a deficient number, since it is larger than the sum of its proper divisors (610101224).

1220202442 is an equidigital number, since it uses as much as digits as its factorization.

1220202442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610101223.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 1220202442 is about 34931.3962217373. The cubic root of 1220202442 is about 1068.5888294199.

Adding to 1220202442 its reverse (2442020221), we get a palindrome (3662222663).

The spelling of 1220202442 in words is "one billion, two hundred twenty million, two hundred two thousand, four hundred forty-two".