1210671951061 has 2 divisors, whose sum is σ = 1210671951062. Its totient is φ = 1210671951060.

The previous prime is 1210671951059. The next prime is 1210671951107. The reversal of 1210671951061 is 1601591760121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1031494140625 + 179177810436 = 1015625^2 + 423294^2 .

It is a cyclic number.

It is not a de Polignac number, because 1210671951061 - 2¹ = 1210671951059 is a prime.

Together with 1210671951059, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1210671951001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605335975530 + 605335975531.

It is an arithmetic number, because the mean of its divisors is an integer number (605335975531).

Almost surely, 2^{1210671951061} is an apocalyptic number.

It is an amenable number.

1210671951061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210671951061 is an equidigital number, since it uses as much as digits as its factorization.

1210671951061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 40.

The spelling of 1210671951061 in words is "one trillion, two hundred ten billion, six hundred seventy-one million, nine hundred fifty-one thousand, sixty-one".