140121532252381 has 2 divisors, whose sum is σ = 140121532252382. Its totient is φ = 140121532252380.

The previous prime is 140121532252367. The next prime is 140121532252433. The reversal of 140121532252381 is 183252235121041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102278230092900 + 37843302159481 = 10113270^2 + 6151691^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140121532252381 is a prime.

It is a super-2 number, since 2×140121532252381² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140121532252301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70060766126190 + 70060766126191.

It is an arithmetic number, because the mean of its divisors is an integer number (70060766126191).

Almost surely, 2^{140121532252381} is an apocalyptic number.

It is an amenable number.

140121532252381 is a deficient number, since it is larger than the sum of its proper divisors (1).

140121532252381 is an equidigital number, since it uses as much as digits as its factorization.

140121532252381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 115200, while the sum is 40.

The spelling of 140121532252381 in words is "one hundred forty trillion, one hundred twenty-one billion, five hundred thirty-two million, two hundred fifty-two thousand, three hundred eighty-one".