4021412121 has 12 divisors (see below), whose sum is σ = 5809796772. Its totient is φ = 2680438176.

The previous prime is 4021412119. The next prime is 4021412123. The reversal of 4021412121 is 1212141204.

4021412121 is a `hidden beast` number, since 402 + 141 + 2 + 121 = 666.

It is an interprime number because it is at equal distance from previous prime (4021412119) and next prime (4021412123).

It can be written as a sum of positive squares in 2 ways, for example, as 848906496 + 3172505625 = 29136^2 + 56325^2 .

It is not a de Polignac number, because 4021412121 - 2¹ = 4021412119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4021412094 and 4021412103.

It is not an unprimeable number, because it can be changed into a prime (4021412123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12375 + ... + 90531.

It is an arithmetic number, because the mean of its divisors is an integer number (484149731).

Almost surely, 2^4021412121 is an apocalyptic number.

It is an amenable number.

4021412121 is a deficient number, since it is larger than the sum of its proper divisors (1788384651).

4021412121 is a wasteful number, since it uses less digits than its factorization.

4021412121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83880 (or 83877 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 4021412121 is about 63414.6049502794. The cubic root of 4021412121 is about 1590.2284814651.

Adding to 4021412121 its reverse (1212141204), we get a palindrome (5233553325).

The spelling of 4021412121 in words is "four billion, twenty-one million, four hundred twelve thousand, one hundred twenty-one".