211216126939 has 2 divisors, whose sum is σ = 211216126940. Its totient is φ = 211216126938.

The previous prime is 211216126931. The next prime is 211216126949. The reversal of 211216126939 is 939621612112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211216126939 - 2³ = 211216126931 is a prime.

It is a super-2 number, since 2×211216126939² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211216126895 and 211216126904.

It is not a weakly prime, because it can be changed into another prime (211216126931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105608063469 + 105608063470.

It is an arithmetic number, because the mean of its divisors is an integer number (105608063470).

Almost surely, 2^211216126939 is an apocalyptic number.

211216126939 is a deficient number, since it is larger than the sum of its proper divisors (1).

211216126939 is an equidigital number, since it uses as much as digits as its factorization.

211216126939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 43.

The spelling of 211216126939 in words is "two hundred eleven billion, two hundred sixteen million, one hundred twenty-six thousand, nine hundred thirty-nine".