201121102101021 has 8 divisors (see below), whose sum is σ = 268165707619104. Its totient is φ = 134078615658480.

The previous prime is 201121102101013. The next prime is 201121102101037. The reversal of 201121102101021 is 120101201121102.

It is a happy number.

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

It is not a de Polignac number, because 201121102101021 - 2³ = 201121102101013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201121102102021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 529547415 + ... + 529927076.

It is an arithmetic number, because the mean of its divisors is an integer number (33520713452388).

Almost surely, 2^{201121102101021} is an apocalyptic number.

It is an amenable number.

201121102101021 is a deficient number, since it is larger than the sum of its proper divisors (67044605518083).

201121102101021 is a wasteful number, since it uses less digits than its factorization.

201121102101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1059537771.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 201121102101021 its reverse (120101201121102), we get a palindrome (321222303222123).

The spelling of 201121102101021 in words is "two hundred one trillion, one hundred twenty-one billion, one hundred two million, one hundred one thousand, twenty-one".