1220435051 has 4 divisors (see below), whose sum is σ = 1331383704. Its totient is φ = 1109486400.

The previous prime is 1220435033. The next prime is 1220435077. The reversal of 1220435051 is 1505340221.

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

It is not a de Polignac number, because 1220435051 - 2²² = 1216240747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220434051) 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 in 3 ways as a sum of consecutive naturals, for example, 55474310 + ... + 55474331.

It is an arithmetic number, because the mean of its divisors is an integer number (332845926).

Almost surely, 2^1220435051 is an apocalyptic number.

1220435051 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1220435051 is a deficient number, since it is larger than the sum of its proper divisors (110948653).

1220435051 is a wasteful number, since it uses less digits than its factorization.

1220435051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110948652.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1220435051 is about 34934.7255749920. The cubic root of 1220435051 is about 1068.6567273297.

Adding to 1220435051 its reverse (1505340221), we get a palindrome (2725775272).

The spelling of 1220435051 in words is "one billion, two hundred twenty million, four hundred thirty-five thousand, fifty-one".