21014512133 has 2 divisors, whose sum is σ = 21014512134. Its totient is φ = 21014512132.

The previous prime is 21014512093. The next prime is 21014512201. The reversal of 21014512133 is 33121541012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17102885284 + 3911626849 = 130778^2 + 62543^2 .

It is a cyclic number.

It is not a de Polignac number, because 21014512133 - 2¹² = 21014508037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21014512099 and 21014512108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21014512033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10507256066 + 10507256067.

It is an arithmetic number, because the mean of its divisors is an integer number (10507256067).

Almost surely, 2^21014512133 is an apocalyptic number.

It is an amenable number.

21014512133 is a deficient number, since it is larger than the sum of its proper divisors (1).

21014512133 is an equidigital number, since it uses as much as digits as its factorization.

21014512133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

The spelling of 21014512133 in words is "twenty-one billion, fourteen million, five hundred twelve thousand, one hundred thirty-three".