3420420021321 has 4 divisors (see below), whose sum is σ = 4560560028432. Its totient is φ = 2280280014212.

The previous prime is 3420420021259. The next prime is 3420420021341. The reversal of 3420420021321 is 1231200240243.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3420420021321 - 2¹⁷ = 3420419890249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3420420021291 and 3420420021300.

It is not an unprimeable number, because it can be changed into a prime (3420420021341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 570070003551 + ... + 570070003556.

It is an arithmetic number, because the mean of its divisors is an integer number (1140140007108).

Almost surely, 2^{3420420021321} is an apocalyptic number.

It is an amenable number.

3420420021321 is a deficient number, since it is larger than the sum of its proper divisors (1140140007111).

3420420021321 is a wasteful number, since it uses less digits than its factorization.

3420420021321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140140007110.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 3420420021321 its reverse (1231200240243), we get a palindrome (4651620261564).

The spelling of 3420420021321 in words is "three trillion, four hundred twenty billion, four hundred twenty million, twenty-one thousand, three hundred twenty-one".