1012661416261 has 4 divisors (see below), whose sum is σ = 1104721545024. Its totient is φ = 920601287500.

The previous prime is 1012661416259. The next prime is 1012661416343. The reversal of 1012661416261 is 1626141662101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1012661416261 - 2¹ = 1012661416259 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1012661416261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012661416861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46030064365 + ... + 46030064386.

It is an arithmetic number, because the mean of its divisors is an integer number (276180386256).

Almost surely, 2^{1012661416261} is an apocalyptic number.

1012661416261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1012661416261 is a deficient number, since it is larger than the sum of its proper divisors (92060128763).

1012661416261 is an equidigital number, since it uses as much as digits as its factorization.

1012661416261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92060128762.

The product of its (nonzero) digits is 20736, while the sum is 37.

The spelling of 1012661416261 in words is "one trillion, twelve billion, six hundred sixty-one million, four hundred sixteen thousand, two hundred sixty-one".