21330223031129 has 2 divisors, whose sum is σ = 21330223031130. Its totient is φ = 21330223031128.

The previous prime is 21330223031101. The next prime is 21330223031137. The reversal of 21330223031129 is 92113032203312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19979112040000 + 1351110991129 = 4469800^2 + 1162373^2 .

It is a cyclic number.

It is not a de Polignac number, because 21330223031129 - 2³² = 21325928063833 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21330223031095 and 21330223031104.

It is not a weakly prime, because it can be changed into another prime (21330223033129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10665111515564 + 10665111515565.

It is an arithmetic number, because the mean of its divisors is an integer number (10665111515565).

Almost surely, 2^{21330223031129} is an apocalyptic number.

It is an amenable number.

21330223031129 is a deficient number, since it is larger than the sum of its proper divisors (1).

21330223031129 is an equidigital number, since it uses as much as digits as its factorization.

21330223031129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 32.

The spelling of 21330223031129 in words is "twenty-one trillion, three hundred thirty billion, two hundred twenty-three million, thirty-one thousand, one hundred twenty-nine".