201121210121101 has 8 divisors (see below), whose sum is σ = 211733123407520. Its totient is φ = 190511955478512.

The previous prime is 201121210121017. The next prime is 201121210121131. The reversal of 201121210121101 is 101121012121102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201121210121101 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 (201121210121131) 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, 664505670 + ... + 664808263.

It is an arithmetic number, because the mean of its divisors is an integer number (26466640425940).

Almost surely, 2^{201121210121101} is an apocalyptic number.

It is an amenable number.

201121210121101 is a deficient number, since it is larger than the sum of its proper divisors (10611913286419).

201121210121101 is a wasteful number, since it uses less digits than its factorization.

201121210121101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1329321915.

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

Adding to 201121210121101 its reverse (101121012121102), we get a palindrome (302242222242203).

The spelling of 201121210121101 in words is "two hundred one trillion, one hundred twenty-one billion, two hundred ten million, one hundred twenty-one thousand, one hundred one".