21133333037 has 2 divisors, whose sum is σ = 21133333038. Its totient is φ = 21133333036.

The previous prime is 21133333003. The next prime is 21133333121. The reversal of 21133333037 is 73033333112.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15035909641 + 6097423396 = 122621^2 + 78086^2 .

It is a cyclic number.

It is not a de Polignac number, because 21133333037 - 2¹⁰ = 21133332013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21133333537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10566666518 + 10566666519.

It is an arithmetic number, because the mean of its divisors is an integer number (10566666519).

Almost surely, 2^21133333037 is an apocalyptic number.

It is an amenable number.

21133333037 is a deficient number, since it is larger than the sum of its proper divisors (1).

21133333037 is an equidigital number, since it uses as much as digits as its factorization.

21133333037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10206, while the sum is 29.

Adding to 21133333037 its reverse (73033333112), we get a palindrome (94166666149).

The spelling of 21133333037 in words is "twenty-one billion, one hundred thirty-three million, three hundred thirty-three thousand, thirty-seven".