21121101230201 has 8 divisors (see below), whose sum is σ = 24631021843200. Its totient is φ = 18103801054164.

The previous prime is 21121101230189. The next prime is 21121101230237. The reversal of 21121101230201 is 10203210112112.

It is a happy number.

It is not a de Polignac number, because 21121101230201 - 2⁶ = 21121101230137 is a prime.

It is a super-3 number, since 3×21121101230201³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 21121101230201.

It is not an unprimeable number, because it can be changed into a prime (21121101230291) 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, 30788776961 + ... + 30788777646.

It is an arithmetic number, because the mean of its divisors is an integer number (3078877730400).

Almost surely, 2^{21121101230201} is an apocalyptic number.

It is an amenable number.

21121101230201 is a deficient number, since it is larger than the sum of its proper divisors (3509920612999).

21121101230201 is an frugal number, since it uses more digits than its factorization.

21121101230201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61577554628 (or 61577554614 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 21121101230201 its reverse (10203210112112), we get a palindrome (31324311342313).

The spelling of 21121101230201 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred one million, two hundred thirty thousand, two hundred one".