140015555221 has 2 divisors, whose sum is σ = 140015555222. Its totient is φ = 140015555220.

The previous prime is 140015555213. The next prime is 140015555233. The reversal of 140015555221 is 122555510041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76375402321 + 63640152900 = 276361^2 + 252270^2 .

It is an emirp because it is prime and its reverse (122555510041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140015555221 - 2³ = 140015555213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140015555291) 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, 70007777610 + 70007777611.

It is an arithmetic number, because the mean of its divisors is an integer number (70007777611).

Almost surely, 2^140015555221 is an apocalyptic number.

It is an amenable number.

140015555221 is a deficient number, since it is larger than the sum of its proper divisors (1).

140015555221 is an equidigital number, since it uses as much as digits as its factorization.

140015555221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10000, while the sum is 31.

The spelling of 140015555221 in words is "one hundred forty billion, fifteen million, five hundred fifty-five thousand, two hundred twenty-one".