3120221122121 has 4 divisors (see below), whose sum is σ = 3120403683012. Its totient is φ = 3120038561232.

The previous prime is 3120221122033. The next prime is 3120221122141. The reversal of 3120221122121 is 1212211220213.

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 1612087302400 + 1508133819721 = 1269680^2 + 1228061^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3120221122121 is a prime.

It is a super-3 number, since 3×3120221122121³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3120221122093 and 3120221122102.

It is not an unprimeable number, because it can be changed into a prime (3120221122141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91254806 + ... + 91288991.

It is an arithmetic number, because the mean of its divisors is an integer number (780100920753).

Almost surely, 2^{3120221122121} is an apocalyptic number.

It is an amenable number.

3120221122121 is a deficient number, since it is larger than the sum of its proper divisors (182560891).

3120221122121 is a wasteful number, since it uses less digits than its factorization.

3120221122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182560890.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 3120221122121 its reverse (1212211220213), we get a palindrome (4332432342334).

The spelling of 3120221122121 in words is "three trillion, one hundred twenty billion, two hundred twenty-one million, one hundred twenty-two thousand, one hundred twenty-one".