201121001100121 has 16 divisors (see below), whose sum is σ = 202066292292480. Its totient is φ = 200178156222720.

The previous prime is 201121001100091. The next prime is 201121001100127. The reversal of 201121001100121 is 121001100121102.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 201121001100121 - 2⁹ = 201121001099609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201121001100127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 774488020 + ... + 774747658.

It is an arithmetic number, because the mean of its divisors is an integer number (12629143268280).

Almost surely, 2^{201121001100121} is an apocalyptic number.

It is an amenable number.

201121001100121 is a deficient number, since it is larger than the sum of its proper divisors (945291192359).

201121001100121 is a wasteful number, since it uses less digits than its factorization.

201121001100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264336.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 201121001100121 its reverse (121001100121102), we get a palindrome (322122101221223).

The spelling of 201121001100121 in words is "two hundred one trillion, one hundred twenty-one billion, one million, one hundred thousand, one hundred twenty-one".