201021100990 has 8 divisors (see below), whose sum is σ = 361837981800. Its totient is φ = 80408440392.

The previous prime is 201021100979. The next prime is 201021101027. The reversal of 201021100990 is 99001120102.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10051055040 + ... + 10051055059.

It is an arithmetic number, because the mean of its divisors is an integer number (45229747725).

Almost surely, 2^201021100990 is an apocalyptic number.

201021100990 is a deficient number, since it is larger than the sum of its proper divisors (160816880810).

201021100990 is a wasteful number, since it uses less digits than its factorization.

201021100990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20102110106.

The product of its (nonzero) digits is 324, while the sum is 25.

The spelling of 201021100990 in words is "two hundred one billion, twenty-one million, one hundred thousand, nine hundred ninety".