2121197083489 has 9 divisors (see below), whose sum is σ = 2331581346129. Its totient is φ = 1928346420660.

The previous prime is 2121197083483. The next prime is 2121197083517. The reversal of 2121197083489 is 9843807911212.

The square root of 2121197083489 is 1456433.

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

It is not a de Polignac number, because 2121197083489 - 2⁷ = 2121197083361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121197083483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 15954562 + ... + 16086964.

Almost surely, 2^{2121197083489} is an apocalyptic number.

2121197083489 is the 1456433-rd square number.

2121197083489 is the 728217-th centered octagonal number.

It is an amenable number.

2121197083489 is a deficient number, since it is larger than the sum of its proper divisors (210384262640).

2121197083489 is an frugal number, since it uses more digits than its factorization.

2121197083489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264828 (or 132414 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 55.

The spelling of 2121197083489 in words is "two trillion, one hundred twenty-one billion, one hundred ninety-seven million, eighty-three thousand, four hundred eighty-nine".