213021329951 has 2 divisors, whose sum is σ = 213021329952. Its totient is φ = 213021329950.

The previous prime is 213021329933. The next prime is 213021329971. The reversal of 213021329951 is 159923120312.

213021329951 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213021329951 - 2¹⁴ = 213021313567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213021329971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106510664975 + 106510664976.

It is an arithmetic number, because the mean of its divisors is an integer number (106510664976).

Almost surely, 2^213021329951 is an apocalyptic number.

213021329951 is a deficient number, since it is larger than the sum of its proper divisors (1).

213021329951 is an equidigital number, since it uses as much as digits as its factorization.

213021329951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 38.

The spelling of 213021329951 in words is "two hundred thirteen billion, twenty-one million, three hundred twenty-nine thousand, nine hundred fifty-one".