21321030113121 has 32 divisors (see below), whose sum is σ = 28749913915392. Its totient is φ = 14053712341760.

The previous prime is 21321030113113. The next prime is 21321030113129. The reversal of 21321030113121 is 12131103012312.

It is an interprime number because it is at equal distance from previous prime (21321030113113) and next prime (21321030113129).

It is a cyclic number.

It is not a de Polignac number, because 21321030113121 - 2³ = 21321030113113 is a prime.

It is a super-2 number, since 2×21321030113121² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21321030113129) 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, 1037862976 + ... + 1037883518.

It is an arithmetic number, because the mean of its divisors is an integer number (898434809856).

Almost surely, 2^{21321030113121} is an apocalyptic number.

It is an amenable number.

21321030113121 is a deficient number, since it is larger than the sum of its proper divisors (7428883802271).

21321030113121 is a wasteful number, since it uses less digits than its factorization.

21321030113121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28013.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 21321030113121 its reverse (12131103012312), we get a palindrome (33452133125433).

The spelling of 21321030113121 in words is "twenty-one trillion, three hundred twenty-one billion, thirty million, one hundred thirteen thousand, one hundred twenty-one".