3020121132221 has 4 divisors (see below), whose sum is σ = 3020141263932. Its totient is φ = 3020101000512.

The previous prime is 3020121132209. The next prime is 3020121132241. The reversal of 3020121132221 is 1222311210203.

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 2079395724121 + 940725408100 = 1442011^2 + 969910^2 .

It is a cyclic number.

It is not a de Polignac number, because 3020121132221 - 2⁶ = 3020121132157 is a prime.

It is a super-2 number, since 2×3020121132221² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3020121132193 and 3020121132202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3020121132241) 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, 9839126 + ... + 10141431.

It is an arithmetic number, because the mean of its divisors is an integer number (755035315983).

Almost surely, 2^{3020121132221} is an apocalyptic number.

It is an amenable number.

3020121132221 is a deficient number, since it is larger than the sum of its proper divisors (20131711).

3020121132221 is a wasteful number, since it uses less digits than its factorization.

3020121132221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20131710.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 3020121132221 its reverse (1222311210203), we get a palindrome (4242432342424).

The spelling of 3020121132221 in words is "three trillion, twenty billion, one hundred twenty-one million, one hundred thirty-two thousand, two hundred twenty-one".