1220104351 has 4 divisors (see below), whose sum is σ = 1220396152. Its totient is φ = 1219812552.

The previous prime is 1220104339. The next prime is 1220104357. The reversal of 1220104351 is 1534010221.

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

It is a cyclic number.

It is not a de Polignac number, because 1220104351 - 2¹³ = 1220096159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220104357) 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, 139536 + ... + 148021.

It is an arithmetic number, because the mean of its divisors is an integer number (305099038).

Almost surely, 2^1220104351 is an apocalyptic number.

1220104351 is a deficient number, since it is larger than the sum of its proper divisors (291801).

1220104351 is an equidigital number, since it uses as much as digits as its factorization.

1220104351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291800.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1220104351 is about 34929.9921414248. The cubic root of 1220104351 is about 1068.5601943475.

Adding to 1220104351 its reverse (1534010221), we get a palindrome (2754114572).

The spelling of 1220104351 in words is "one billion, two hundred twenty million, one hundred four thousand, three hundred fifty-one".