199120991210 has 16 divisors (see below), whose sum is σ = 358431088392. Its totient is φ = 79645440000.

The previous prime is 199120991171. The next prime is 199120991219. The reversal of 199120991210 is 12199021991.

It can be written as a sum of positive squares in 4 ways, for example, as 149449508569 + 49671482641 = 386587^2 + 222871^2 .

It is not an unprimeable number, because it can be changed into a prime (199120991219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75551 + ... + 635570.

Almost surely, 2^199120991210 is an apocalyptic number.

199120991210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199120991210 is a deficient number, since it is larger than the sum of its proper divisors (159310097182).

199120991210 is a wasteful number, since it uses less digits than its factorization.

199120991210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739129.

The product of its (nonzero) digits is 26244, while the sum is 44.

The spelling of 199120991210 in words is "one hundred ninety-nine billion, one hundred twenty million, nine hundred ninety-one thousand, two hundred ten".