21000032031113 has 2 divisors, whose sum is σ = 21000032031114. Its totient is φ = 21000032031112.

The previous prime is 21000032031103. The next prime is 21000032031149. The reversal of 21000032031113 is 31113023000012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20447733354889 + 552298676224 = 4521917^2 + 743168^2 .

It is a cyclic number.

It is not a de Polignac number, because 21000032031113 - 2²⁶ = 20999964922249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21000032031091 and 21000032031100.

It is not a weakly prime, because it can be changed into another prime (21000032031103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500016015556 + 10500016015557.

It is an arithmetic number, because the mean of its divisors is an integer number (10500016015557).

Almost surely, 2^{21000032031113} is an apocalyptic number.

It is an amenable number.

21000032031113 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000032031113 is an equidigital number, since it uses as much as digits as its factorization.

21000032031113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21000032031113 its reverse (31113023000012), we get a palindrome (52113055031125).

The spelling of 21000032031113 in words is "twenty-one trillion, thirty-two million, thirty-one thousand, one hundred thirteen".