1220521124 has 12 divisors (see below), whose sum is σ = 2157932364. Its totient is φ = 603969024.

The previous prime is 1220521117. The next prime is 1220521163. The reversal of 1220521124 is 4211250221.

It can be written as a sum of positive squares in 2 ways, for example, as 587092900 + 633428224 = 24230^2 + 25168^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1220521096 and 1220521105.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1572449 + ... + 1573224.

It is an arithmetic number, because the mean of its divisors is an integer number (179827697).

Almost surely, 2^1220521124 is an apocalyptic number.

It is an amenable number.

1220521124 is a deficient number, since it is larger than the sum of its proper divisors (937411240).

1220521124 is a wasteful number, since it uses less digits than its factorization.

1220521124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3145774 (or 3145772 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 1220521124 is about 34935.9574650531. The cubic root of 1220521124 is about 1068.6818496083.

Adding to 1220521124 its reverse (4211250221), we get a palindrome (5431771345).

The spelling of 1220521124 in words is "one billion, two hundred twenty million, five hundred twenty-one thousand, one hundred twenty-four".