4121422207821 has 24 divisors (see below), whose sum is σ = 5990393678360. Its totient is φ = 2730454531200.

The previous prime is 4121422207783. The next prime is 4121422207873. The reversal of 4121422207821 is 1287022241214.

4121422207821 is a `hidden beast` number, since 4 + 1 + 2 + 1 + 422 + 207 + 8 + 21 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 427472746596 + 3693949461225 = 653814^2 + 1921965^2 .

It is not a de Polignac number, because 4121422207821 - 2¹⁴ = 4121422191437 is a prime.

It is a super-2 number, since 2×4121422207821² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4121422207121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1333635 + ... + 3165663.

Almost surely, 2^{4121422207821} is an apocalyptic number.

It is an amenable number.

4121422207821 is a deficient number, since it is larger than the sum of its proper divisors (1868971470539).

4121422207821 is a wasteful number, since it uses less digits than its factorization.

4121422207821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1833597 (or 1833594 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 36.

The spelling of 4121422207821 in words is "four trillion, one hundred twenty-one billion, four hundred twenty-two million, two hundred seven thousand, eight hundred twenty-one".