201211009998 has 8 divisors (see below), whose sum is σ = 402422020008. Its totient is φ = 67070336664.

The previous prime is 201211009931. The next prime is 201211010081. The reversal of 201211009998 is 899900112102.

It is a sphenic number, since it is the product of 3 distinct primes.

201211009998 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16767584161 + ... + 16767584172.

It is an arithmetic number, because the mean of its divisors is an integer number (50302752501).

Almost surely, 2^201211009998 is an apocalyptic number.

201211009998 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

201211009998 is a wasteful number, since it uses less digits than its factorization.

201211009998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33535168338.

The product of its (nonzero) digits is 23328, while the sum is 42.

The spelling of 201211009998 in words is "two hundred one billion, two hundred eleven million, nine thousand, nine hundred ninety-eight".