1225701171681 has 16 divisors (see below), whose sum is σ = 1869492194304. Its totient is φ = 699741766224.

The previous prime is 1225701171671. The next prime is 1225701171701. The reversal of 1225701171681 is 1861711075221.

It is a happy number.

It is not a de Polignac number, because 1225701171681 - 2¹¹ = 1225701169633 is a prime.

It is a super-2 number, since 2×1225701171681² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1225701171661) 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, 27431451 + ... + 27476096.

It is an arithmetic number, because the mean of its divisors is an integer number (116843262144).

Almost surely, 2^{1225701171681} is an apocalyptic number.

It is an amenable number.

1225701171681 is a deficient number, since it is larger than the sum of its proper divisors (643791022623).

1225701171681 is a wasteful number, since it uses less digits than its factorization.

1225701171681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54908620.

The product of its (nonzero) digits is 47040, while the sum is 42.

The spelling of 1225701171681 in words is "one trillion, two hundred twenty-five billion, seven hundred one million, one hundred seventy-one thousand, six hundred eighty-one".