126511564212 has 72 divisors (see below), whose sum is σ = 348981534720. Its totient is φ = 38324056320.

The previous prime is 126511564183. The next prime is 126511564313. The reversal of 126511564212 is 212465115621.

126511564212 is a `hidden beast` number, since 1 + 2 + 6 + 5 + 1 + 1 + 5 + 642 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1171533 + ... + 1274955.

It is an arithmetic number, because the mean of its divisors is an integer number (4846965760).

Almost surely, 2^126511564212 is an apocalyptic number.

126511564212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

126511564212 is an abundant number, since it is smaller than the sum of its proper divisors (222469970508).

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

126511564212 is a wasteful number, since it uses less digits than its factorization.

126511564212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106533 (or 106528 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

Adding to 126511564212 its reverse (212465115621), we get a palindrome (338976679833).

The spelling of 126511564212 in words is "one hundred twenty-six billion, five hundred eleven million, five hundred sixty-four thousand, two hundred twelve".