1220231103221 has 16 divisors (see below), whose sum is σ = 1382026727424. Its totient is φ = 1068911230464.

The previous prime is 1220231103209. The next prime is 1220231103227. The reversal of 1220231103221 is 1223011320221.

It is a cyclic number.

It is not a de Polignac number, because 1220231103221 - 2³⁴ = 1203051234037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220231103193 and 1220231103202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220231103227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16029116 + ... + 16105061.

It is an arithmetic number, because the mean of its divisors is an integer number (86376670464).

Almost surely, 2^{1220231103221} is an apocalyptic number.

It is an amenable number.

1220231103221 is a deficient number, since it is larger than the sum of its proper divisors (161795624203).

1220231103221 is a wasteful number, since it uses less digits than its factorization.

1220231103221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32134340.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1220231103221 its reverse (1223011320221), we get a palindrome (2443242423442).

The spelling of 1220231103221 in words is "one trillion, two hundred twenty billion, two hundred thirty-one million, one hundred three thousand, two hundred twenty-one".