126215207712 has 144 divisors (see below), whose sum is σ = 392343588000. Its totient is φ = 38169907200.

The previous prime is 126215207707. The next prime is 126215207761. The reversal of 126215207712 is 217702512621.

126215207712 is a `hidden beast` number, since 1 + 2 + 62 + 1 + 520 + 7 + 71 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

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

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, 1540912 + ... + 1620752.

It is an arithmetic number, because the mean of its divisors is an integer number (2724608250).

Almost surely, 2^126215207712 is an apocalyptic number.

126215207712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 126215207712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196171794000).

126215207712 is an abundant number, since it is smaller than the sum of its proper divisors (266128380288).

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

126215207712 is a wasteful number, since it uses less digits than its factorization.

126215207712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80367 (or 80356 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The spelling of 126215207712 in words is "one hundred twenty-six billion, two hundred fifteen million, two hundred seven thousand, seven hundred twelve".