126360136421 has 2 divisors, whose sum is σ = 126360136422. Its totient is φ = 126360136420.

The previous prime is 126360136387. The next prime is 126360136447. The reversal of 126360136421 is 124631063621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75831390625 + 50528745796 = 275375^2 + 224786^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126360136421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126360136921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63180068210 + 63180068211.

It is an arithmetic number, because the mean of its divisors is an integer number (63180068211).

Almost surely, 2^126360136421 is an apocalyptic number.

It is an amenable number.

126360136421 is a deficient number, since it is larger than the sum of its proper divisors (1).

126360136421 is an equidigital number, since it uses as much as digits as its factorization.

126360136421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 35.

The spelling of 126360136421 in words is "one hundred twenty-six billion, three hundred sixty million, one hundred thirty-six thousand, four hundred twenty-one".