121472558488681 has 9 divisors (see below), whose sum is σ = 124363683265719. Its totient is φ = 118647152366736.

The previous prime is 121472558488637. The next prime is 121472558488691. The reversal of 121472558488681 is 186884855274121.

The square root of 121472558488681 is 11021459.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 21704743557225 + 99767814931456 = 4658835^2 + 9988384^2 .

It is not a de Polignac number, because 121472558488681 - 2¹⁹ = 121472557964393 is a prime.

It is a super-2 number, since 2×121472558488681² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121472558488681.

It is not an unprimeable number, because it can be changed into a prime (121472558488621) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 473794581 + ... + 474050893.

Almost surely, 2^{121472558488681} is an apocalyptic number.

121472558488681 is the 11021459-th square number.

121472558488681 is the 5510730-th centered octagonal number.

It is an amenable number.

121472558488681 is a deficient number, since it is larger than the sum of its proper divisors (2891124777038).

121472558488681 is an frugal number, since it uses more digits than its factorization.

121472558488681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512712 (or 256356 counting only the distinct ones).

The product of its digits is 275251200, while the sum is 70.

The spelling of 121472558488681 in words is "one hundred twenty-one trillion, four hundred seventy-two billion, five hundred fifty-eight million, four hundred eighty-eight thousand, six hundred eighty-one".