11138264821 has 2 divisors, whose sum is σ = 11138264822. Its totient is φ = 11138264820.

The previous prime is 11138264803. The next prime is 11138264861. The reversal of 11138264821 is 12846283111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9897464196 + 1240800625 = 99486^2 + 35225^2 .

It is a cyclic number.

It is not a de Polignac number, because 11138264821 - 2¹⁷ = 11138133749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11138264861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5569132410 + 5569132411.

It is an arithmetic number, because the mean of its divisors is an integer number (5569132411).

Almost surely, 2^11138264821 is an apocalyptic number.

It is an amenable number.

11138264821 is a deficient number, since it is larger than the sum of its proper divisors (1).

11138264821 is an equidigital number, since it uses as much as digits as its factorization.

11138264821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18432, while the sum is 37.

The spelling of 11138264821 in words is "eleven billion, one hundred thirty-eight million, two hundred sixty-four thousand, eight hundred twenty-one".