4113212121 has 6 divisors (see below), whose sum is σ = 5941306410. Its totient is φ = 2742141408.

The previous prime is 4113212099. The next prime is 4113212137. The reversal of 4113212121 is 1212123114.

It can be written as a sum of positive squares in only one way, i.e., 3787048521 + 326163600 = 61539^2 + 18060^2 .

It is not a de Polignac number, because 4113212121 - 2¹⁰ = 4113211097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4113212094 and 4113212103.

It is not an unprimeable number, because it can be changed into a prime (4113212021) 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 5 ways as a sum of consecutive naturals, for example, 228511776 + ... + 228511793.

It is an arithmetic number, because the mean of its divisors is an integer number (990217735).

Almost surely, 2^4113212121 is an apocalyptic number.

It is an amenable number.

4113212121 is a deficient number, since it is larger than the sum of its proper divisors (1828094289).

4113212121 is a wasteful number, since it uses less digits than its factorization.

4113212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457023575 (or 457023572 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

The square root of 4113212121 is about 64134.3287249504. The cubic root of 4113212121 is about 1602.2380296435.

Adding to 4113212121 its reverse (1212123114), we get a palindrome (5325335235).

The spelling of 4113212121 in words is "four billion, one hundred thirteen million, two hundred twelve thousand, one hundred twenty-one".