126934772521 has 2 divisors, whose sum is σ = 126934772522. Its totient is φ = 126934772520.

The previous prime is 126934772477. The next prime is 126934772533. The reversal of 126934772521 is 125277439621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120870256896 + 6064515625 = 347664^2 + 77875^2 .

It is a cyclic number.

It is not a de Polignac number, because 126934772521 - 2¹³ = 126934764329 is a prime.

It is a super-2 number, since 2×126934772521² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (126934772561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63467386260 + 63467386261.

It is an arithmetic number, because the mean of its divisors is an integer number (63467386261).

Almost surely, 2^126934772521 is an apocalyptic number.

It is an amenable number.

126934772521 is a deficient number, since it is larger than the sum of its proper divisors (1).

126934772521 is an equidigital number, since it uses as much as digits as its factorization.

126934772521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 49.

The spelling of 126934772521 in words is "one hundred twenty-six billion, nine hundred thirty-four million, seven hundred seventy-two thousand, five hundred twenty-one".