1220038245121 has 4 divisors (see below), whose sum is σ = 1233746540100. Its totient is φ = 1206329950144.

The previous prime is 1220038245091. The next prime is 1220038245133. The reversal of 1220038245121 is 1215428300221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 178454708721 + 1041583536400 = 422439^2 + 1020580^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220038245121 - 2¹⁹ = 1220037720833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220038243121) 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 3 ways as a sum of consecutive naturals, for example, 6854147356 + ... + 6854147533.

It is an arithmetic number, because the mean of its divisors is an integer number (308436635025).

Almost surely, 2^{1220038245121} is an apocalyptic number.

It is an amenable number.

1220038245121 is a deficient number, since it is larger than the sum of its proper divisors (13708294979).

1220038245121 is an equidigital number, since it uses as much as digits as its factorization.

1220038245121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13708294978.

The product of its (nonzero) digits is 7680, while the sum is 31.

The spelling of 1220038245121 in words is "one trillion, two hundred twenty billion, thirty-eight million, two hundred forty-five thousand, one hundred twenty-one".