126221152305 has 32 divisors (see below), whose sum is σ = 218806372224. Its totient is φ = 61884619776.

The previous prime is 126221152303. The next prime is 126221152333. The reversal of 126221152305 is 503251122621.

It is not a de Polignac number, because 126221152305 - 2¹ = 126221152303 is a prime.

It is not an unprimeable number, because it can be changed into a prime (126221152303) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5744674 + ... + 5766603.

It is an arithmetic number, because the mean of its divisors is an integer number (6837699132).

Almost surely, 2^126221152305 is an apocalyptic number.

126221152305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

126221152305 is a deficient number, since it is larger than the sum of its proper divisors (92585219919).

126221152305 is a wasteful number, since it uses less digits than its factorization.

126221152305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11511345.

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 126221152305 its reverse (503251122621), we get a palindrome (629472274926).

The spelling of 126221152305 in words is "one hundred twenty-six billion, two hundred twenty-one million, one hundred fifty-two thousand, three hundred five".