1201221020281 has 2 divisors, whose sum is σ = 1201221020282. Its totient is φ = 1201221020280.

The previous prime is 1201221020191. The next prime is 1201221020291. The reversal of 1201221020281 is 1820201221021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 636492818025 + 564728202256 = 797805^2 + 751484^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201221020281 - 2¹¹ = 1201221018233 is a prime.

It is a super-2 number, since 2×1201221020281² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1201221020291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600610510140 + 600610510141.

It is an arithmetic number, because the mean of its divisors is an integer number (600610510141).

Almost surely, 2^{1201221020281} is an apocalyptic number.

It is an amenable number.

1201221020281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201221020281 is an equidigital number, since it uses as much as digits as its factorization.

1201221020281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 22.

The spelling of 1201221020281 in words is "one trillion, two hundred one billion, two hundred twenty-one million, twenty thousand, two hundred eighty-one".