211420342979 has 2 divisors, whose sum is σ = 211420342980. Its totient is φ = 211420342978.

The previous prime is 211420342961. The next prime is 211420343083. The reversal of 211420342979 is 979243024112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211420342979 - 2⁸ = 211420342723 is a prime.

It is a super-2 number, since 2×211420342979² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211420302979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105710171489 + 105710171490.

It is an arithmetic number, because the mean of its divisors is an integer number (105710171490).

Almost surely, 2^211420342979 is an apocalyptic number.

211420342979 is a deficient number, since it is larger than the sum of its proper divisors (1).

211420342979 is an equidigital number, since it uses as much as digits as its factorization.

211420342979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 44.

The spelling of 211420342979 in words is "two hundred eleven billion, four hundred twenty million, three hundred forty-two thousand, nine hundred seventy-nine".