201021121219999 has 8 divisors (see below), whose sum is σ = 201472374118880. Its totient is φ = 200569918023936.

The previous prime is 201021121219909. The next prime is 201021121220009. The reversal of 201021121219999 is 999912121120102.

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

It is a cyclic number.

It is not a de Polignac number, because 201021121219999 - 2⁹ = 201021121219487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201021121219909) 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, 4321779 + ... + 20511460.

It is an arithmetic number, because the mean of its divisors is an integer number (25184046764860).

Almost surely, 2^{201021121219999} is an apocalyptic number.

201021121219999 is a deficient number, since it is larger than the sum of its proper divisors (451252898881).

201021121219999 is a wasteful number, since it uses less digits than its factorization.

201021121219999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24851409.

The product of its (nonzero) digits is 104976, while the sum is 49.

The spelling of 201021121219999 in words is "two hundred one trillion, twenty-one billion, one hundred twenty-one million, two hundred nineteen thousand, nine hundred ninety-nine".