1121138161541 has 8 divisors (see below), whose sum is σ = 1151468426904. Its totient is φ = 1090809434880.

The previous prime is 1121138161531. The next prime is 1121138161571. The reversal of 1121138161541 is 1451618311211.

It can be written as a sum of positive squares in 4 ways, for example, as 1077309064225 + 43829097316 = 1037935^2 + 209354^2 .

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 1121138161541 - 2⁶ = 1121138161477 is a prime.

It is a super-2 number, since 2×1121138161541² (a number of 25 digits) contains 22 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 (1121138161531) 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, 1176881 + ... + 1904553.

It is an arithmetic number, because the mean of its divisors is an integer number (143933553363).

Almost surely, 2^{1121138161541} is an apocalyptic number.

It is an amenable number.

1121138161541 is a deficient number, since it is larger than the sum of its proper divisors (30330265363).

1121138161541 is an equidigital number, since it uses as much as digits as its factorization.

1121138161541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769351.

The product of its digits is 5760, while the sum is 35.

The spelling of 1121138161541 in words is "one trillion, one hundred twenty-one billion, one hundred thirty-eight million, one hundred sixty-one thousand, five hundred forty-one".