1256322133001 has 16 divisors (see below), whose sum is σ = 1357340846400. Its totient is φ = 1155933628608.

The previous prime is 1256322132979. The next prime is 1256322133021. The reversal of 1256322133001 is 1003312236521.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1256322133001 - 2¹⁴ = 1256322116617 is a prime.

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, 6368435 + ... + 6562743.

It is an arithmetic number, because the mean of its divisors is an integer number (84833802900).

Almost surely, 2^{1256322133001} is an apocalyptic number.

It is an amenable number.

1256322133001 is a deficient number, since it is larger than the sum of its proper divisors (101018713399).

1256322133001 is a wasteful number, since it uses less digits than its factorization.

1256322133001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195928.

The product of its (nonzero) digits is 6480, while the sum is 29.

Adding to 1256322133001 its reverse (1003312236521), we get a palindrome (2259634369522).

The spelling of 1256322133001 in words is "one trillion, two hundred fifty-six billion, three hundred twenty-two million, one hundred thirty-three thousand, one".