19121100210 has 48 divisors (see below), whose sum is σ = 49766498496. Its totient is φ = 5093663904.

The previous prime is 19121100203. The next prime is 19121100211. The reversal of 19121100210 is 1200112191.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (19121100211) 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 23 ways as a sum of consecutive naturals, for example, 22824 + ... + 196883.

It is an arithmetic number, because the mean of its divisors is an integer number (1036802052).

Almost surely, 2^19121100210 is an apocalyptic number.

19121100210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19121100210 is an abundant number, since it is smaller than the sum of its proper divisors (30645398286).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19121100210 is a wasteful number, since it uses less digits than its factorization.

19121100210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220687 (or 220684 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

The spelling of 19121100210 in words is "nineteen billion, one hundred twenty-one million, one hundred thousand, two hundred ten".