3211121689 has 2 divisors, whose sum is σ = 3211121690. Its totient is φ = 3211121688.

The previous prime is 3211121677. The next prime is 3211121713. The reversal of 3211121689 is 9861211123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2959360000 + 251761689 = 54400^2 + 15867^2 .

It is an emirp because it is prime and its reverse (9861211123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3211121689 - 2⁷ = 3211121561 is a prime.

It is a super-4 number, since 4×3211121689⁴ (a number of 39 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (3211121629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1605560844 + 1605560845.

It is an arithmetic number, because the mean of its divisors is an integer number (1605560845).

Almost surely, 2^3211121689 is an apocalyptic number.

It is an amenable number.

3211121689 is a deficient number, since it is larger than the sum of its proper divisors (1).

3211121689 is an equidigital number, since it uses as much as digits as its factorization.

3211121689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 34.

The square root of 3211121689 is about 56666.7600009035. The cubic root of 3211121689 is about 1475.3178193243.

The spelling of 3211121689 in words is "three billion, two hundred eleven million, one hundred twenty-one thousand, six hundred eighty-nine".