1220060521 has 16 divisors (see below), whose sum is σ = 1285963776. Its totient is φ = 1156050000.

The previous prime is 1220060483. The next prime is 1220060551. The reversal of 1220060521 is 1250600221.

It is a cyclic number.

It is not a de Polignac number, because 1220060521 - 2⁷ = 1220060393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220060551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 330516 + ... + 334186.

It is an arithmetic number, because the mean of its divisors is an integer number (80372736).

Almost surely, 2^1220060521 is an apocalyptic number.

It is an amenable number.

1220060521 is a deficient number, since it is larger than the sum of its proper divisors (65903255).

1220060521 is a wasteful number, since it uses less digits than its factorization.

1220060521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3924.

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

The square root of 1220060521 is about 34929.3647379966. The cubic root of 1220060521 is about 1068.5473988425.

Adding to 1220060521 its reverse (1250600221), we get a palindrome (2470660742).

The spelling of 1220060521 in words is "one billion, two hundred twenty million, sixty thousand, five hundred twenty-one".