1220342113 has 4 divisors (see below), whose sum is σ = 1221552580. Its totient is φ = 1219131648.

The previous prime is 1220342099. The next prime is 1220342147. The reversal of 1220342113 is 3112430221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3112430221 = 1721 ⋅1808501.

It can be written as a sum of positive squares in 2 ways, for example, as 550981729 + 669360384 = 23473^2 + 25872^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220342113 - 2¹³ = 1220333921 is a prime.

It is a super-2 number, since 2×1220342113² = 2978469745522609538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220342153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 603720 + ... + 605737.

It is an arithmetic number, because the mean of its divisors is an integer number (305388145).

Almost surely, 2^1220342113 is an apocalyptic number.

It is an amenable number.

1220342113 is a deficient number, since it is larger than the sum of its proper divisors (1210467).

1220342113 is a wasteful number, since it uses less digits than its factorization.

1220342113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1210466.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1220342113 is about 34933.3953832146. The cubic root of 1220342113 is about 1068.6296000251.

Adding to 1220342113 its reverse (3112430221), we get a palindrome (4332772334).

The spelling of 1220342113 in words is "one billion, two hundred twenty million, three hundred forty-two thousand, one hundred thirteen".