142423211042221 has 2 divisors, whose sum is σ = 142423211042222. Its totient is φ = 142423211042220.

The previous prime is 142423211042153. The next prime is 142423211042261. The reversal of 142423211042221 is 122240112324241.

142423211042221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78258545260996 + 64164665781225 = 8846386^2 + 8010285^2 .

It is an emirp because it is prime and its reverse (122240112324241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142423211042221 - 2³¹ = 142421063558573 is a prime.

It is a super-2 number, since 2×142423211042221² (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 (142423211042261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71211605521110 + 71211605521111.

It is an arithmetic number, because the mean of its divisors is an integer number (71211605521111).

Almost surely, 2^{142423211042221} is an apocalyptic number.

It is an amenable number.

142423211042221 is a deficient number, since it is larger than the sum of its proper divisors (1).

142423211042221 is an equidigital number, since it uses as much as digits as its factorization.

142423211042221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12288, while the sum is 31.

Adding to 142423211042221 its reverse (122240112324241), we get a palindrome (264663323366462).

The spelling of 142423211042221 in words is "one hundred forty-two trillion, four hundred twenty-three billion, two hundred eleven million, forty-two thousand, two hundred twenty-one".