11420040021437 has 2 divisors, whose sum is σ = 11420040021438. Its totient is φ = 11420040021436.

The previous prime is 11420040021389. The next prime is 11420040021617. The reversal of 11420040021437 is 73412004002411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5910218036836 + 5509821984601 = 2431094^2 + 2347301^2 .

It is a cyclic number.

It is not a de Polignac number, because 11420040021437 - 2³⁴ = 11402860152253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11420030021437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5710020010718 + 5710020010719.

It is an arithmetic number, because the mean of its divisors is an integer number (5710020010719).

Almost surely, 2^{11420040021437} is an apocalyptic number.

It is an amenable number.

11420040021437 is a deficient number, since it is larger than the sum of its proper divisors (1).

11420040021437 is an equidigital number, since it uses as much as digits as its factorization.

11420040021437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 29.

Adding to 11420040021437 its reverse (73412004002411), we get a palindrome (84832044023848).

The spelling of 11420040021437 in words is "eleven trillion, four hundred twenty billion, forty million, twenty-one thousand, four hundred thirty-seven".