22140340021 has 2 divisors, whose sum is σ = 22140340022. Its totient is φ = 22140340020.

The previous prime is 22140339967. The next prime is 22140340037. The reversal of 22140340021 is 12004304122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20942141796 + 1198198225 = 144714^2 + 34615^2 .

It is a cyclic number.

It is not a de Polignac number, because 22140340021 - 2²¹ = 22138242869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22140340091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11070170010 + 11070170011.

It is an arithmetic number, because the mean of its divisors is an integer number (11070170011).

Almost surely, 2^22140340021 is an apocalyptic number.

It is an amenable number.

22140340021 is a deficient number, since it is larger than the sum of its proper divisors (1).

22140340021 is an equidigital number, since it uses as much as digits as its factorization.

22140340021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 22140340021 its reverse (12004304122), we get a palindrome (34144644143).

The spelling of 22140340021 in words is "twenty-two billion, one hundred forty million, three hundred forty thousand, twenty-one".