126221622072 has 64 divisors (see below), whose sum is σ = 388374228480. Its totient is φ = 33289218432.

The previous prime is 126221622061. The next prime is 126221622101. The reversal of 126221622072 is 270226122621.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28894708 + ... + 28899075.

It is an arithmetic number, because the mean of its divisors is an integer number (6068347320).

Almost surely, 2^126221622072 is an apocalyptic number.

126221622072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

126221622072 is an abundant number, since it is smaller than the sum of its proper divisors (262152606408).

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

126221622072 is a wasteful number, since it uses less digits than its factorization.

126221622072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57793812 (or 57793808 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

Adding to 126221622072 its reverse (270226122621), we get a palindrome (396447744693).

The spelling of 126221622072 in words is "one hundred twenty-six billion, two hundred twenty-one million, six hundred twenty-two thousand, seventy-two".