1012551260261 has 16 divisors (see below), whose sum is σ = 1042606857600. Its totient is φ = 982803530688.

The previous prime is 1012551260239. The next prime is 1012551260377. The reversal of 1012551260261 is 1620621552101.

It is a cyclic number.

It is not a de Polignac number, because 1012551260261 - 2³⁰ = 1011477518437 is a prime.

It is a super-2 number, since 2×1012551260261² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012551200261) 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 in 15 ways as a sum of consecutive naturals, for example, 7035935 + ... + 7178403.

It is an arithmetic number, because the mean of its divisors is an integer number (65162928600).

Almost surely, 2^{1012551260261} is an apocalyptic number.

It is an amenable number.

1012551260261 is a deficient number, since it is larger than the sum of its proper divisors (30055597339).

1012551260261 is a wasteful number, since it uses less digits than its factorization.

1012551260261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143548.

The product of its (nonzero) digits is 7200, while the sum is 32.

The spelling of 1012551260261 in words is "one trillion, twelve billion, five hundred fifty-one million, two hundred sixty thousand, two hundred sixty-one".