201121211121103 has 32 divisors (see below), whose sum is σ = 253687224268800. Its totient is φ = 155221633622016.

The previous prime is 201121211121079. The next prime is 201121211121133. The reversal of 201121211121103 is 301121112121102.

It is not a de Polignac number, because 201121211121103 - 2¹³ = 201121211112911 is a prime.

It is a super-2 number, since 2×201121211121103² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201121211121133) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 167934898 + ... + 169128271.

It is an arithmetic number, because the mean of its divisors is an integer number (7927725758400).

Almost surely, 2^{201121211121103} is an apocalyptic number.

201121211121103 is a deficient number, since it is larger than the sum of its proper divisors (52566013147697).

201121211121103 is a wasteful number, since it uses less digits than its factorization.

201121211121103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337063351.

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

Adding to 201121211121103 its reverse (301121112121102), we get a palindrome (502242323242205).

Subtracting 201121211121103 from its reverse (301121112121102), we obtain a palindrome (99999900999999).

The spelling of 201121211121103 in words is "two hundred one trillion, one hundred twenty-one billion, two hundred eleven million, one hundred twenty-one thousand, one hundred three".