1256322133027 has 16 divisors (see below), whose sum is σ = 1399931648640. Its totient is φ = 1119440552832.

The previous prime is 1256322133021. The next prime is 1256322133037. The reversal of 1256322133027 is 7203312236521.

It is a cyclic number.

It is not a de Polignac number, because 1256322133027 - 2¹⁹ = 1256321608739 is a prime.

It is a super-2 number, since 2×1256322133027² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1256322133021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1309213 + ... + 2055889.

It is an arithmetic number, because the mean of its divisors is an integer number (87495728040).

Almost surely, 2^{1256322133027} is an apocalyptic number.

1256322133027 is a deficient number, since it is larger than the sum of its proper divisors (143609515613).

1256322133027 is a wasteful number, since it uses less digits than its factorization.

1256322133027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751182.

The product of its (nonzero) digits is 90720, while the sum is 37.

Adding to 1256322133027 its reverse (7203312236521), we get a palindrome (8459634369548).

The spelling of 1256322133027 in words is "one trillion, two hundred fifty-six billion, three hundred twenty-two million, one hundred thirty-three thousand, twenty-seven".