1210917573889 has 9 divisors (see below), whose sum is σ = 1244571449961. Its totient is φ = 1178150456880.

The previous prime is 1210917573881. The next prime is 1210917573907. The reversal of 1210917573889 is 9883757190121.

The square root of 1210917573889 is 1100417.

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

It can be written as a sum of positive squares in 4 ways, for example, as 746055425025 + 464862148864 = 863745^2 + 681808^2 .

It is not a de Polignac number, because 1210917573889 - 2³ = 1210917573881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1210917573881) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 40700559 + ... + 40730299.

Almost surely, 2^{1210917573889} is an apocalyptic number.

1210917573889 is the 1100417-th square number.

1210917573889 is the 550209-th centered octagonal number.

It is an amenable number.

1210917573889 is a deficient number, since it is larger than the sum of its proper divisors (33653876072).

1210917573889 is an frugal number, since it uses more digits than its factorization.

1210917573889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59556 (or 29778 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 61.

The spelling of 1210917573889 in words is "one trillion, two hundred ten billion, nine hundred seventeen million, five hundred seventy-three thousand, eight hundred eighty-nine".