1200001000061 has 2 divisors, whose sum is σ = 1200001000062. Its totient is φ = 1200001000060.

The previous prime is 1200001000027. The next prime is 1200001000109. The reversal of 1200001000061 is 1600001000021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 752393168836 + 447607831225 = 867406^2 + 669035^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200001000061 - 2¹⁴ = 1200000983677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200001002061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600000500030 + 600000500031.

It is an arithmetic number, because the mean of its divisors is an integer number (600000500031).

Almost surely, 2^{1200001000061} is an apocalyptic number.

It is an amenable number.

1200001000061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200001000061 is an equidigital number, since it uses as much as digits as its factorization.

1200001000061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 1200001000061 its reverse (1600001000021), we get a palindrome (2800002000082).

The spelling of 1200001000061 in words is "one trillion, two hundred billion, one million, sixty-one", and thus it is an aban number.