1011272879257 has 4 divisors (see below), whose sum is σ = 1035938071476. Its totient is φ = 986607687040.

The previous prime is 1011272879251. The next prime is 1011272879341. The reversal of 1011272879257 is 7529782721101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 79692725401 + 931580153856 = 282299^2 + 965184^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011272879257 - 2¹⁹ = 1011272354969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011272879251) 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, 12332596048 + ... + 12332596129.

It is an arithmetic number, because the mean of its divisors is an integer number (258984517869).

Almost surely, 2^{1011272879257} is an apocalyptic number.

It is an amenable number.

1011272879257 is a deficient number, since it is larger than the sum of its proper divisors (24665192219).

1011272879257 is an equidigital number, since it uses as much as digits as its factorization.

1011272879257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24665192218.

The product of its (nonzero) digits is 987840, while the sum is 52.

The spelling of 1011272879257 in words is "one trillion, eleven billion, two hundred seventy-two million, eight hundred seventy-nine thousand, two hundred fifty-seven".