119821899409 has 9 divisors (see below), whose sum is σ = 121907979337. Its totient is φ = 117770942884.

The previous prime is 119821899397. The next prime is 119821899419. The reversal of 119821899409 is 904998128911.

The square root of 119821899409 is 346153.

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

It is not a de Polignac number, because 119821899409 - 2¹¹ = 119821897361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (119821899419) 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, 20420094 + ... + 20425960.

Almost surely, 2^119821899409 is an apocalyptic number.

119821899409 is the 346153-rd square number.

119821899409 is the 173077-th centered octagonal number.

It is an amenable number.

119821899409 is a deficient number, since it is larger than the sum of its proper divisors (2086079928).

119821899409 is an frugal number, since it uses more digits than its factorization.

119821899409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11852 (or 5926 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 61.

The spelling of 119821899409 in words is "one hundred nineteen billion, eight hundred twenty-one million, eight hundred ninety-nine thousand, four hundred nine".