3211121022121 has 4 divisors (see below), whose sum is σ = 3211926020100. Its totient is φ = 3210316024144.

The previous prime is 3211121022047. The next prime is 3211121022133. The reversal of 3211121022121 is 1212201211123.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 971417216025 + 2239703806096 = 985605^2 + 1496564^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3211121022121 is a prime.

It is a super-2 number, since 2×3211121022121² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3211121026121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 402493006 + ... + 402500983.

It is an arithmetic number, because the mean of its divisors is an integer number (802981505025).

Almost surely, 2^{3211121022121} is an apocalyptic number.

It is an amenable number.

3211121022121 is a deficient number, since it is larger than the sum of its proper divisors (804997979).

3211121022121 is an equidigital number, since it uses as much as digits as its factorization.

3211121022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804997978.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 3211121022121 its reverse (1212201211123), we get a palindrome (4423322233244).

The spelling of 3211121022121 in words is "three trillion, two hundred eleven billion, one hundred twenty-one million, twenty-two thousand, one hundred twenty-one".