3420440121 has 8 divisors (see below), whose sum is σ = 5212099264. Its totient is φ = 1954537200.

The previous prime is 3420440113. The next prime is 3420440131. The reversal of 3420440121 is 1210440243.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3420440121 - 2³ = 3420440113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 162878101 = 3420440121 / (3 + 4 + 2 + 0 + 4 + 4 + 0 + 1 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3420440131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81439030 + ... + 81439071.

It is an arithmetic number, because the mean of its divisors is an integer number (651512408).

Almost surely, 2^3420440121 is an apocalyptic number.

It is an amenable number.

3420440121 is a deficient number, since it is larger than the sum of its proper divisors (1791659143).

3420440121 is a wasteful number, since it uses less digits than its factorization.

3420440121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162878111.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 3420440121 is about 58484.5289029501. The cubic root of 3420440121 is about 1506.7018817038.

Adding to 3420440121 its reverse (1210440243), we get a palindrome (4630880364).

The spelling of 3420440121 in words is "three billion, four hundred twenty million, four hundred forty thousand, one hundred twenty-one".