1220012020061 has 2 divisors, whose sum is σ = 1220012020062. Its totient is φ = 1220012020060.

The previous prime is 1220012020049. The next prime is 1220012020141. The reversal of 1220012020061 is 1600202100221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 999670027225 + 220341992836 = 999835^2 + 469406^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220012020061 - 2¹⁸ = 1220011757917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220012080061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610006010030 + 610006010031.

It is an arithmetic number, because the mean of its divisors is an integer number (610006010031).

Almost surely, 2^{1220012020061} is an apocalyptic number.

It is an amenable number.

1220012020061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220012020061 is an equidigital number, since it uses as much as digits as its factorization.

1220012020061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 1220012020061 its reverse (1600202100221), we get a palindrome (2820214120282).

The spelling of 1220012020061 in words is "one trillion, two hundred twenty billion, twelve million, twenty thousand, sixty-one".