1306121642770 has 24 divisors (see below), whose sum is σ = 2734858787724. Its totient is φ = 447813134496.

The previous prime is 1306121642767. The next prime is 1306121642849. The reversal of 1306121642770 is 772461216031.

It can be written as a sum of positive squares in 2 ways, for example, as 1285527383721 + 20594259049 = 1133811^2 + 143507^2 .

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 1332776697 + ... + 1332777676.

Almost surely, 2^{1306121642770} is an apocalyptic number.

1306121642770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1306121642770 is an abundant number, since it is smaller than the sum of its proper divisors (1428737144954).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1306121642770 is a wasteful number, since it uses less digits than its factorization.

1306121642770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2665554394 (or 2665554387 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 40.

The spelling of 1306121642770 in words is "one trillion, three hundred six billion, one hundred twenty-one million, six hundred forty-two thousand, seven hundred seventy".