1220524444221 has 16 divisors (see below), whose sum is σ = 1634623360128. Its totient is φ = 810056332800.

The previous prime is 1220524444187. The next prime is 1220524444253. The reversal of 1220524444221 is 1224444250221.

It is not a de Polignac number, because 1220524444221 - 2⁷ = 1220524444093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220524444261) 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, 2095656 + ... + 2613966.

It is an arithmetic number, because the mean of its divisors is an integer number (102163960008).

Almost surely, 2^{1220524444221} is an apocalyptic number.

It is an amenable number.

1220524444221 is a deficient number, since it is larger than the sum of its proper divisors (414098915907).

1220524444221 is a wasteful number, since it uses less digits than its factorization.

1220524444221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521812.

The product of its (nonzero) digits is 40960, while the sum is 33.

Adding to 1220524444221 its reverse (1224444250221), we get a palindrome (2444968694442).

The spelling of 1220524444221 in words is "one trillion, two hundred twenty billion, five hundred twenty-four million, four hundred forty-four thousand, two hundred twenty-one".