1255357721111 has 8 divisors (see below), whose sum is σ = 1351944888000. Its totient is φ = 1158773581152.

The previous prime is 1255357721021. The next prime is 1255357721119. The reversal of 1255357721111 is 1111277535521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1255357721111 is a prime.

It is a super-4 number, since 4×1255357721111⁴ (a number of 49 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255357721119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144386 + ... + 1591088.

It is an arithmetic number, because the mean of its divisors is an integer number (168993111000).

Almost surely, 2^{1255357721111} is an apocalyptic number.

1255357721111 is a deficient number, since it is larger than the sum of its proper divisors (96587166889).

1255357721111 is a wasteful number, since it uses less digits than its factorization.

1255357721111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1513465.

The product of its digits is 73500, while the sum is 41.

The spelling of 1255357721111 in words is "one trillion, two hundred fifty-five billion, three hundred fifty-seven million, seven hundred twenty-one thousand, one hundred eleven".