211101312121021 has 8 divisors (see below), whose sum is σ = 255450327272640. Its totient is φ = 170300218181568.

The previous prime is 211101312121013. The next prime is 211101312121033. The reversal of 211101312121021 is 120121213101112.

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 211101312121021 - 2³ = 211101312121013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211101312121021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211101312121321) 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, 886980302911 + ... + 886980303148.

It is an arithmetic number, because the mean of its divisors is an integer number (31931290909080).

Almost surely, 2^{211101312121021} is an apocalyptic number.

It is an amenable number.

211101312121021 is a deficient number, since it is larger than the sum of its proper divisors (44349015151619).

211101312121021 is a wasteful number, since it uses less digits than its factorization.

211101312121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1773960606083.

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 211101312121021 its reverse (120121213101112), we get a palindrome (331222525222133).

The spelling of 211101312121021 in words is "two hundred eleven trillion, one hundred one billion, three hundred twelve million, one hundred twenty-one thousand, twenty-one".