29955210830021 has 2 divisors, whose sum is σ = 29955210830022. Its totient is φ = 29955210830020.

The previous prime is 29955210829979. The next prime is 29955210830131. The reversal of 29955210830021 is 12003801255992.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28763377922500 + 1191832907521 = 5363150^2 + 1091711^2 .

It is a cyclic number.

It is not a de Polignac number, because 29955210830021 - 2³⁸ = 29680332923077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29955210830621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14977605415010 + 14977605415011.

It is an arithmetic number, because the mean of its divisors is an integer number (14977605415011).

Almost surely, 2^{29955210830021} is an apocalyptic number.

It is an amenable number.

29955210830021 is a deficient number, since it is larger than the sum of its proper divisors (1).

29955210830021 is an equidigital number, since it uses as much as digits as its factorization.

29955210830021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 388800, while the sum is 47.

The spelling of 29955210830021 in words is "twenty-nine trillion, nine hundred fifty-five billion, two hundred ten million, eight hundred thirty thousand, twenty-one".