1042131236261 has 4 divisors (see below), whose sum is σ = 1042334822400. Its totient is φ = 1041927650124.

The previous prime is 1042131236257. The next prime is 1042131236281. The reversal of 1042131236261 is 1626321312401.

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 1042131236261 - 2² = 1042131236257 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1042131236281) 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 in 3 ways as a sum of consecutive naturals, for example, 101785391 + ... + 101795628.

It is an arithmetic number, because the mean of its divisors is an integer number (260583705600).

Almost surely, 2^{1042131236261} is an apocalyptic number.

It is an amenable number.

1042131236261 is a deficient number, since it is larger than the sum of its proper divisors (203586139).

1042131236261 is an equidigital number, since it uses as much as digits as its factorization.

1042131236261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203586138.

The product of its (nonzero) digits is 10368, while the sum is 32.

Adding to 1042131236261 its reverse (1626321312401), we get a palindrome (2668452548662).

The spelling of 1042131236261 in words is "one trillion, forty-two billion, one hundred thirty-one million, two hundred thirty-six thousand, two hundred sixty-one".