142766310221 has 2 divisors, whose sum is σ = 142766310222. Its totient is φ = 142766310220.

The previous prime is 142766310179. The next prime is 142766310227. The reversal of 142766310221 is 122013667241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111856802500 + 30909507721 = 334450^2 + 175811^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142766310221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142766310227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71383155110 + 71383155111.

It is an arithmetic number, because the mean of its divisors is an integer number (71383155111).

Almost surely, 2^142766310221 is an apocalyptic number.

It is an amenable number.

142766310221 is a deficient number, since it is larger than the sum of its proper divisors (1).

142766310221 is an equidigital number, since it uses as much as digits as its factorization.

142766310221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 35.

Adding to 142766310221 its reverse (122013667241), we get a palindrome (264779977462).

The spelling of 142766310221 in words is "one hundred forty-two billion, seven hundred sixty-six million, three hundred ten thousand, two hundred twenty-one".