1121521774085 has 4 divisors (see below), whose sum is σ = 1345826128908. Its totient is φ = 897217419264.

The previous prime is 1121521774069. The next prime is 1121521774091. The reversal of 1121521774085 is 5804771251211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 177208163521 + 944313610564 = 420961^2 + 971758^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121521774085 - 2⁴ = 1121521774069 is a prime.

It is a super-2 number, since 2×1121521774085² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112152177404 + ... + 112152177413.

It is an arithmetic number, because the mean of its divisors is an integer number (336456532227).

Almost surely, 2^{1121521774085} is an apocalyptic number.

It is an amenable number.

1121521774085 is a deficient number, since it is larger than the sum of its proper divisors (224304354823).

1121521774085 is an equidigital number, since it uses as much as digits as its factorization.

1121521774085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224304354822.

The product of its (nonzero) digits is 156800, while the sum is 44.

The spelling of 1121521774085 in words is "one trillion, one hundred twenty-one billion, five hundred twenty-one million, seven hundred seventy-four thousand, eighty-five".