1055111321501 has 8 divisors (see below), whose sum is σ = 1122847644600. Its totient is φ = 988005104128.

The previous prime is 1055111321497. The next prime is 1055111321519. The reversal of 1055111321501 is 1051231115501.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 622576231225 + 432535090276 = 789035^2 + 657674^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1055111321501 - 2² = 1055111321497 is a prime.

It is a super-2 number, since 2×1055111321501² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1055111321521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157522976 + ... + 157529673.

It is an arithmetic number, because the mean of its divisors is an integer number (140355955575).

Almost surely, 2^{1055111321501} is an apocalyptic number.

It is an amenable number.

1055111321501 is a deficient number, since it is larger than the sum of its proper divisors (67736323099).

1055111321501 is a wasteful number, since it uses less digits than its factorization.

1055111321501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315052863.

The product of its (nonzero) digits is 750, while the sum is 26.

The spelling of 1055111321501 in words is "one trillion, fifty-five billion, one hundred eleven million, three hundred twenty-one thousand, five hundred one".