140121442421221 has 2 divisors, whose sum is σ = 140121442421222. Its totient is φ = 140121442421220.

The previous prime is 140121442421189. The next prime is 140121442421251. The reversal of 140121442421221 is 122124244121041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75004450781121 + 65116991640100 = 8660511^2 + 8069510^2 .

It is a cyclic number.

It is not a de Polignac number, because 140121442421221 - 2⁵ = 140121442421189 is a prime.

It is a super-2 number, since 2×140121442421221² (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 (140121442421251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70060721210610 + 70060721210611.

It is an arithmetic number, because the mean of its divisors is an integer number (70060721210611).

Almost surely, 2^{140121442421221} is an apocalyptic number.

It is an amenable number.

140121442421221 is a deficient number, since it is larger than the sum of its proper divisors (1).

140121442421221 is an equidigital number, since it uses as much as digits as its factorization.

140121442421221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8192, while the sum is 31.

Adding to 140121442421221 its reverse (122124244121041), we get a palindrome (262245686542262).

The spelling of 140121442421221 in words is "one hundred forty trillion, one hundred twenty-one billion, four hundred forty-two million, four hundred twenty-one thousand, two hundred twenty-one".