1220300031121 has 2 divisors, whose sum is σ = 1220300031122. Its totient is φ = 1220300031120.

The previous prime is 1220300031101. The next prime is 1220300031131. The reversal of 1220300031121 is 1211300030221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 782320791121 + 437979240000 = 884489^2 + 661800^2 .

It is an emirp because it is prime and its reverse (1211300030221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220300031121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1220300031095 and 1220300031104.

It is not a weakly prime, because it can be changed into another prime (1220300031101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610150015560 + 610150015561.

It is an arithmetic number, because the mean of its divisors is an integer number (610150015561).

Almost surely, 2^{1220300031121} is an apocalyptic number.

It is an amenable number.

1220300031121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220300031121 is an equidigital number, since it uses as much as digits as its factorization.

1220300031121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 1220300031121 its reverse (1211300030221), we get a palindrome (2431600061342).

The spelling of 1220300031121 in words is "one trillion, two hundred twenty billion, three hundred million, thirty-one thousand, one hundred twenty-one".