3211123121 has 2 divisors, whose sum is σ = 3211123122. Its totient is φ = 3211123120.

The previous prime is 3211123093. The next prime is 3211123141. The reversal of 3211123121 is 1213211123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2165506225 + 1045616896 = 46535^2 + 32336^2 .

It is a cyclic number.

It is not a de Polignac number, because 3211123121 - 2¹⁰ = 3211122097 is a prime.

It is a super-2 number, since 2×3211123121² = 20622623396441561282, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3211123121.

It is not a weakly prime, because it can be changed into another prime (3211123141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1605561560 + 1605561561.

It is an arithmetic number, because the mean of its divisors is an integer number (1605561561).

Almost surely, 2^3211123121 is an apocalyptic number.

It is an amenable number.

3211123121 is a deficient number, since it is larger than the sum of its proper divisors (1).

3211123121 is an equidigital number, since it uses as much as digits as its factorization.

3211123121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72, while the sum is 17.

The square root of 3211123121 is about 56666.7726361754. The cubic root of 3211123121 is about 1475.3180386303.

Adding to 3211123121 its reverse (1213211123), we get a palindrome (4424334244).

It can be divided in two parts, 3211123 and 121, that multiplied together give a palindrome (388545883).

The spelling of 3211123121 in words is "three billion, two hundred eleven million, one hundred twenty-three thousand, one hundred twenty-one".