1220305051 has 8 divisors (see below), whose sum is σ = 1395468800. Its totient is φ = 1045349928.

The previous prime is 1220305013. The next prime is 1220305057. The reversal of 1220305051 is 1505030221.

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

It is not a de Polignac number, because 1220305051 - 2⁷ = 1220304923 is a prime.

It is a super-2 number, since 2×1220305051² = 2978288834992225202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220305057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39411 + ... + 63196.

It is an arithmetic number, because the mean of its divisors is an integer number (174433600).

Almost surely, 2^1220305051 is an apocalyptic number.

1220305051 is a deficient number, since it is larger than the sum of its proper divisors (175163749).

1220305051 is a wasteful number, since it uses less digits than its factorization.

1220305051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104313.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 1220305051 is about 34932.8649125719. The cubic root of 1220305051 is about 1068.6187817606.

Adding to 1220305051 its reverse (1505030221), we get a palindrome (2725335272).

The spelling of 1220305051 in words is "one billion, two hundred twenty million, three hundred five thousand, fifty-one".