126986134201 has 4 divisors (see below), whose sum is σ = 127029344400. Its totient is φ = 126942924004.

The previous prime is 126986134189. The next prime is 126986134243. The reversal of 126986134201 is 102431689621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 102431689621 = 19 ⋅5391141559.

It is a cyclic number.

It is not a de Polignac number, because 126986134201 - 2⁷ = 126986134073 is a prime.

It is a super-2 number, since 2×126986134201² (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 (126986134901) 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, 21600691 + ... + 21606568.

It is an arithmetic number, because the mean of its divisors is an integer number (31757336100).

Almost surely, 2^126986134201 is an apocalyptic number.

It is an amenable number.

126986134201 is a deficient number, since it is larger than the sum of its proper divisors (43210199).

126986134201 is an equidigital number, since it uses as much as digits as its factorization.

126986134201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43210198.

The product of its (nonzero) digits is 124416, while the sum is 43.

The spelling of 126986134201 in words is "one hundred twenty-six billion, nine hundred eighty-six million, one hundred thirty-four thousand, two hundred one".