11403052821 has 24 divisors (see below), whose sum is σ = 17635938840. Its totient is φ = 7074456576.

The previous prime is 11403052811. The next prime is 11403052823. The reversal of 11403052821 is 12825030411.

11403052821 is a `hidden beast` number, since 114 + 0 + 3 + 0 + 528 + 21 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4725875025 + 6677177796 = 68745^2 + 81714^2 .

It is not a de Polignac number, because 11403052821 - 2¹⁵ = 11403020053 is a prime.

It is a super-2 number, since 2×11403052821² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11403052823) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 405090 + ... + 432323.

It is an arithmetic number, because the mean of its divisors is an integer number (734830785).

Almost surely, 2^11403052821 is an apocalyptic number.

It is an amenable number.

11403052821 is a deficient number, since it is larger than the sum of its proper divisors (6232886019).

11403052821 is a wasteful number, since it uses less digits than its factorization.

11403052821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837525 (or 837522 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The spelling of 11403052821 in words is "eleven billion, four hundred three million, fifty-two thousand, eight hundred twenty-one".