1021115672761 has 4 divisors (see below), whose sum is σ = 1033418271312. Its totient is φ = 1008813074212.

The previous prime is 1021115672747. The next prime is 1021115672767. The reversal of 1021115672761 is 1672765111201.

It is a happy number.

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 1021115672761 - 2¹⁵ = 1021115639993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021115672767) 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, 6151299151 + ... + 6151299316.

It is an arithmetic number, because the mean of its divisors is an integer number (258354567828).

Almost surely, 2^{1021115672761} is an apocalyptic number.

It is an amenable number.

1021115672761 is a deficient number, since it is larger than the sum of its proper divisors (12302598551).

1021115672761 is an equidigital number, since it uses as much as digits as its factorization.

1021115672761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12302598550.

The product of its (nonzero) digits is 35280, while the sum is 40.

The spelling of 1021115672761 in words is "one trillion, twenty-one billion, one hundred fifteen million, six hundred seventy-two thousand, seven hundred sixty-one".