126216012340 has 36 divisors (see below), whose sum is σ = 291339941508. Its totient is φ = 45896730880.

The previous prime is 126216012233. The next prime is 126216012341. The reversal of 126216012340 is 43210612621.

It can be written as a sum of positive squares in 2 ways, for example, as 66130236964 + 60085775376 = 257158^2 + 245124^2 .

It is a super-2 number, since 2×126216012340² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 126216012299 and 126216012308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126216012341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26075269 + ... + 26080108.

It is an arithmetic number, because the mean of its divisors is an integer number (8092776153).

Almost surely, 2^126216012340 is an apocalyptic number.

126216012340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126216012340 is an abundant number, since it is smaller than the sum of its proper divisors (165123929168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

126216012340 is a wasteful number, since it uses less digits than its factorization.

126216012340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52155408 (or 52155395 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 126216012340 its reverse (43210612621), we get a palindrome (169426624961).

The spelling of 126216012340 in words is "one hundred twenty-six billion, two hundred sixteen million, twelve thousand, three hundred forty".