140223421421 has 2 divisors, whose sum is σ = 140223421422. Its totient is φ = 140223421420.

The previous prime is 140223421417. The next prime is 140223421439. The reversal of 140223421421 is 124124322041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112282627396 + 27940794025 = 335086^2 + 167155^2 .

It is a cyclic number.

It is not a de Polignac number, because 140223421421 - 2² = 140223421417 is a prime.

It is a super-2 number, since 2×140223421421² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140223421411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70111710710 + 70111710711.

It is an arithmetic number, because the mean of its divisors is an integer number (70111710711).

Almost surely, 2^140223421421 is an apocalyptic number.

It is an amenable number.

140223421421 is a deficient number, since it is larger than the sum of its proper divisors (1).

140223421421 is an equidigital number, since it uses as much as digits as its factorization.

140223421421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 140223421421 its reverse (124124322041), we get a palindrome (264347743462).

The spelling of 140223421421 in words is "one hundred forty billion, two hundred twenty-three million, four hundred twenty-one thousand, four hundred twenty-one".