2040121221 has 16 divisors (see below), whose sum is σ = 2730962304. Its totient is φ = 1354693184.

The previous prime is 2040121217. The next prime is 2040121273. The reversal of 2040121221 is 1221210402.

It is a cyclic number.

It is not a de Polignac number, because 2040121221 - 2² = 2040121217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2040121221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2040121211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1020595 + ... + 1022591.

It is an arithmetic number, because the mean of its divisors is an integer number (170685144).

Almost surely, 2^2040121221 is an apocalyptic number.

It is an amenable number.

2040121221 is a deficient number, since it is larger than the sum of its proper divisors (690841083).

2040121221 is a wasteful number, since it uses less digits than its factorization.

2040121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3180.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 2040121221 is about 45167.7010816358. The cubic root of 2040121221 is about 1268.2902615547.

Adding to 2040121221 its reverse (1221210402), we get a palindrome (3261331623).

The spelling of 2040121221 in words is "two billion, forty million, one hundred twenty-one thousand, two hundred twenty-one".