126904554120221 has 16 divisors (see below), whose sum is σ = 135779048543040. Its totient is φ = 118249747499520.

The previous prime is 126904554120199. The next prime is 126904554120247. The reversal of 126904554120221 is 122021455409621.

It is a cyclic number.

It is not a de Polignac number, because 126904554120221 - 2³⁸ = 126629676213277 is a prime.

It is a super-2 number, since 2×126904554120221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126904554120121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27087821 + ... + 31425453.

It is an arithmetic number, because the mean of its divisors is an integer number (8486190533940).

Almost surely, 2^{126904554120221} is an apocalyptic number.

It is an amenable number.

126904554120221 is a deficient number, since it is larger than the sum of its proper divisors (8874494422819).

126904554120221 is a wasteful number, since it uses less digits than its factorization.

126904554120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4362956.

The product of its (nonzero) digits is 345600, while the sum is 44.

The spelling of 126904554120221 in words is "one hundred twenty-six trillion, nine hundred four billion, five hundred fifty-four million, one hundred twenty thousand, two hundred twenty-one".