11056007421 has 6 divisors (see below), whose sum is σ = 15969788510. Its totient is φ = 7370671608.

The previous prime is 11056007401. The next prime is 11056007423. The reversal of 11056007421 is 12470065011.

It is a happy number.

11056007421 is a `hidden beast` number, since 1 + 10 + 5 + 600 + 7 + 42 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10735239321 + 320768100 = 103611^2 + 17910^2 .

It is not a de Polignac number, because 11056007421 - 2⁷ = 11056007293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11056007423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 614222626 + ... + 614222643.

Almost surely, 2^11056007421 is an apocalyptic number.

It is an amenable number.

11056007421 is a deficient number, since it is larger than the sum of its proper divisors (4913781089).

11056007421 is a wasteful number, since it uses less digits than its factorization.

11056007421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1228445275 (or 1228445272 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The spelling of 11056007421 in words is "eleven billion, fifty-six million, seven thousand, four hundred twenty-one".