140220404322421 has 2 divisors, whose sum is σ = 140220404322422. Its totient is φ = 140220404322420.

The previous prime is 140220404322409. The next prime is 140220404322433. The reversal of 140220404322421 is 124223404022041.

It is a balanced prime because it is at equal distance from previous prime (140220404322409) and next prime (140220404322433).

It can be written as a sum of positive squares in only one way, i.e., 139143138851025 + 1077265471396 = 11795895^2 + 1037914^2 .

It is a cyclic number.

It is not a de Polignac number, because 140220404322421 - 2⁵ = 140220404322389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140220404322221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70110202161210 + 70110202161211.

It is an arithmetic number, because the mean of its divisors is an integer number (70110202161211).

Almost surely, 2^{140220404322421} is an apocalyptic number.

It is an amenable number.

140220404322421 is a deficient number, since it is larger than the sum of its proper divisors (1).

140220404322421 is an equidigital number, since it uses as much as digits as its factorization.

140220404322421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24576, while the sum is 31.

Adding to 140220404322421 its reverse (124223404022041), we get a palindrome (264443808344462).

The spelling of 140220404322421 in words is "one hundred forty trillion, two hundred twenty billion, four hundred four million, three hundred twenty-two thousand, four hundred twenty-one".