213021329971 has 2 divisors, whose sum is σ = 213021329972. Its totient is φ = 213021329970.

The previous prime is 213021329951. The next prime is 213021329999. The reversal of 213021329971 is 179923120312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213021329971 - 2¹¹ = 213021327923 is a prime.

It is a super-2 number, since 2×213021329971² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (213021329951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106510664985 + 106510664986.

It is an arithmetic number, because the mean of its divisors is an integer number (106510664986).

Almost surely, 2^213021329971 is an apocalyptic number.

213021329971 is a deficient number, since it is larger than the sum of its proper divisors (1).

213021329971 is an equidigital number, since it uses as much as digits as its factorization.

213021329971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 40.

The spelling of 213021329971 in words is "two hundred thirteen billion, twenty-one million, three hundred twenty-nine thousand, nine hundred seventy-one".