1210261814161 has 9 divisors (see below), whose sum is σ = 1277334390843. Its totient is φ = 1146544021800.

The previous prime is 1210261814137. The next prime is 1210261814269. The reversal of 1210261814161 is 1614181620121.

The square root of 1210261814161 is 1100119.

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., 246841042561 + 963420771600 = 496831^2 + 981540^2 .

It is not a de Polignac number, because 1210261814161 - 2¹¹ = 1210261812113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1210261814561) 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, 20873311 + ... + 20931211.

It is an arithmetic number, because the mean of its divisors is an integer number (141926043427).

Almost surely, 2^{1210261814161} is an apocalyptic number.

1210261814161 is the 1100119-th square number.

1210261814161 is the 550060-th centered octagonal number.

It is an amenable number.

1210261814161 is a deficient number, since it is larger than the sum of its proper divisors (67072576682).

1210261814161 is an frugal number, since it uses more digits than its factorization.

1210261814161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115840 (or 57920 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 34.

The spelling of 1210261814161 in words is "one trillion, two hundred ten billion, two hundred sixty-one million, eight hundred fourteen thousand, one hundred sixty-one".