1135972465921 has 4 divisors (see below), whose sum is σ = 1135974597700. Its totient is φ = 1135970334144.

The previous prime is 1135972465919. The next prime is 1135972465949. The reversal of 1135972465921 is 1295642795311.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 455842375921 + 680130090000 = 675161^2 + 824700^2 .

It is a cyclic number.

It is not a de Polignac number, because 1135972465921 - 2¹ = 1135972465919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1135972465321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 514765 + ... + 1592773.

It is an arithmetic number, because the mean of its divisors is an integer number (283993649425).

Almost surely, 2^{1135972465921} is an apocalyptic number.

It is an amenable number.

1135972465921 is a deficient number, since it is larger than the sum of its proper divisors (2131779).

1135972465921 is a wasteful number, since it uses less digits than its factorization.

1135972465921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2131778.

The product of its digits is 4082400, while the sum is 55.

The spelling of 1135972465921 in words is "one trillion, one hundred thirty-five billion, nine hundred seventy-two million, four hundred sixty-five thousand, nine hundred twenty-one".