21130113233121 has 16 divisors (see below), whose sum is σ = 28705235267520. Its totient is φ = 13820869932480.

The previous prime is 21130113233113. The next prime is 21130113233123. The reversal of 21130113233121 is 12133231103112.

It is not a de Polignac number, because 21130113233121 - 2³ = 21130113233113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21130113233091 and 21130113233100.

It is not an unprimeable number, because it can be changed into a prime (21130113233123) 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, 35662590 + ... + 36250248.

It is an arithmetic number, because the mean of its divisors is an integer number (1794077204220).

Almost surely, 2^{21130113233121} is an apocalyptic number.

It is an amenable number.

21130113233121 is a deficient number, since it is larger than the sum of its proper divisors (7575122034399).

21130113233121 is a wasteful number, since it uses less digits than its factorization.

21130113233121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813856.

The product of its (nonzero) digits is 648, while the sum is 24.

Adding to 21130113233121 its reverse (12133231103112), we get a palindrome (33263344336233).

The spelling of 21130113233121 in words is "twenty-one trillion, one hundred thirty billion, one hundred thirteen million, two hundred thirty-three thousand, one hundred twenty-one".