3200121020921 has 4 divisors (see below), whose sum is σ = 3491041113744. Its totient is φ = 2909200928100.

The previous prime is 3200121020911. The next prime is 3200121020927. The reversal of 3200121020921 is 1290201210023.

It is a happy number.

3200121020921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3200121020921 - 2¹⁸ = 3200120758777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3200121020927) 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, 145460046395 + ... + 145460046416.

It is an arithmetic number, because the mean of its divisors is an integer number (872760278436).

Almost surely, 2^{3200121020921} is an apocalyptic number.

It is an amenable number.

3200121020921 is a deficient number, since it is larger than the sum of its proper divisors (290920092823).

3200121020921 is a wasteful number, since it uses less digits than its factorization.

3200121020921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290920092822.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 3200121020921 its reverse (1290201210023), we get a palindrome (4490322230944).

The spelling of 3200121020921 in words is "three trillion, two hundred billion, one hundred twenty-one million, twenty thousand, nine hundred twenty-one".