3423212121 has 64 divisors (see below), whose sum is σ = 5596774400. Its totient is φ = 1817764416.

The previous prime is 3423212119. The next prime is 3423212131. The reversal of 3423212121 is 1212123243.

It is not a de Polignac number, because 3423212121 - 2¹ = 3423212119 is a prime.

It is a super-2 number, since 2×3423212121² = 23436762450722637282, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

3423212121 is a modest number, since divided by 212121 gives 3423 as remainder.

It is not an unprimeable number, because it can be changed into a prime (3423212101) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7028940 + ... + 7029426.

It is an arithmetic number, because the mean of its divisors is an integer number (87449600).

Almost surely, 2^3423212121 is an apocalyptic number.

It is an amenable number.

3423212121 is a deficient number, since it is larger than the sum of its proper divisors (2173562279).

3423212121 is a wasteful number, since it uses less digits than its factorization.

3423212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818.

The product of its digits is 576, while the sum is 21.

The square root of 3423212121 is about 58508.2226785261. Note that the first 3 decimals coincide. The cubic root of 3423212121 is about 1507.1087932622.

Adding to 3423212121 its reverse (1212123243), we get a palindrome (4635335364).

The spelling of 3423212121 in words is "three billion, four hundred twenty-three million, two hundred twelve thousand, one hundred twenty-one".