126822142681 has 4 divisors (see below), whose sum is σ = 136577692132. Its totient is φ = 117066593232.

The previous prime is 126822142661. The next prime is 126822142693. The reversal of 126822142681 is 186241228621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14530132681 + 112292010000 = 120541^2 + 335100^2 .

It is a cyclic number.

It is not a de Polignac number, because 126822142681 - 2¹⁹ = 126821618393 is a prime.

It is a super-2 number, since 2×126822142681² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126822142661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4877774706 + ... + 4877774731.

It is an arithmetic number, because the mean of its divisors is an integer number (34144423033).

Almost surely, 2^126822142681 is an apocalyptic number.

It is an amenable number.

126822142681 is a deficient number, since it is larger than the sum of its proper divisors (9755549451).

126822142681 is an equidigital number, since it uses as much as digits as its factorization.

126822142681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9755549450.

The product of its digits is 147456, while the sum is 43.

The spelling of 126822142681 in words is "one hundred twenty-six billion, eight hundred twenty-two million, one hundred forty-two thousand, six hundred eighty-one".