1220057111 has 16 divisors (see below), whose sum is σ = 1550051328. Its totient is φ = 934178400.

The previous prime is 1220057101. The next prime is 1220057141. The reversal of 1220057111 is 1117500221.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220057111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220057101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 213425 + ... + 219066.

It is an arithmetic number, because the mean of its divisors is an integer number (96878208).

Almost surely, 2^1220057111 is an apocalyptic number.

1220057111 is a deficient number, since it is larger than the sum of its proper divisors (329994217).

1220057111 is a wasteful number, since it uses less digits than its factorization.

1220057111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432542.

The product of its (nonzero) digits is 140, while the sum is 20.

The square root of 1220057111 is about 34929.3159251652. The cubic root of 1220057111 is about 1068.5464033317.

Adding to 1220057111 its reverse (1117500221), we get a palindrome (2337557332).

The spelling of 1220057111 in words is "one billion, two hundred twenty million, fifty-seven thousand, one hundred eleven".