210101201994 has 16 divisors (see below), whose sum is σ = 425521422720. Its totient is φ = 69147230880.

The previous prime is 210101201993. The next prime is 210101202013. The reversal of 210101201994 is 499102101012.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (210101201993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221625267 + ... + 221626214.

It is an arithmetic number, because the mean of its divisors is an integer number (26595088920).

Almost surely, 2^210101201994 is an apocalyptic number.

210101201994 is an abundant number, since it is smaller than the sum of its proper divisors (215420220726).

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

210101201994 is a wasteful number, since it uses less digits than its factorization.

210101201994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443251565.

The product of its (nonzero) digits is 1296, while the sum is 30.

The spelling of 210101201994 in words is "two hundred ten billion, one hundred one million, two hundred one thousand, nine hundred ninety-four".