1220212442 has 8 divisors (see below), whose sum is σ = 1857637056. Its totient is φ = 601000092.

The previous prime is 1220212403. The next prime is 1220212457. The reversal of 1220212442 is 2442120221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1220212442² = 2977836807223206728, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4552898 + ... + 4553165.

It is an arithmetic number, because the mean of its divisors is an integer number (232204632).

Almost surely, 2^1220212442 is an apocalyptic number.

1220212442 is a deficient number, since it is larger than the sum of its proper divisors (637424614).

1220212442 is an equidigital number, since it uses as much as digits as its factorization.

1220212442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9106132.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 1220212442 is about 34931.5393591522. The cubic root of 1220212442 is about 1068.5917485691.

Adding to 1220212442 its reverse (2442120221), we get a palindrome (3662332663).

The spelling of 1220212442 in words is "one billion, two hundred twenty million, two hundred twelve thousand, four hundred forty-two".