1220100000061 has 2 divisors, whose sum is σ = 1220100000062. Its totient is φ = 1220100000060.

The previous prime is 1220100000023. The next prime is 1220100000079. The reversal of 1220100000061 is 1600000010221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 623359199961 + 596740800100 = 789531^2 + 772490^2 .

It is an emirp because it is prime and its reverse (1600000010221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1220100000061 - 2⁷ = 1220099999933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1220099999987 and 1220100000050.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220100000761) 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, 610050000030 + 610050000031.

It is an arithmetic number, because the mean of its divisors is an integer number (610050000031).

Almost surely, 2^{1220100000061} is an apocalyptic number.

It is an amenable number.

1220100000061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220100000061 is an equidigital number, since it uses as much as digits as its factorization.

1220100000061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 1220100000061 its reverse (1600000010221), we get a palindrome (2820100010282).

The spelling of 1220100000061 in words is "one trillion, two hundred twenty billion, one hundred million, sixty-one", and thus it is an aban number.