3420021663223 has 4 divisors (see below), whose sum is σ = 3730932723528. Its totient is φ = 3109110602920.

The previous prime is 3420021663203. The next prime is 3420021663241. The reversal of 3420021663223 is 3223661200243.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3420021663223 - 2³⁷ = 3282582709751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3420021663203) 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, 155455530136 + ... + 155455530157.

It is an arithmetic number, because the mean of its divisors is an integer number (932733180882).

Almost surely, 2^{3420021663223} is an apocalyptic number.

3420021663223 is a deficient number, since it is larger than the sum of its proper divisors (310911060305).

3420021663223 is a wasteful number, since it uses less digits than its factorization.

3420021663223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310911060304.

The product of its (nonzero) digits is 62208, while the sum is 34.

Adding to 3420021663223 its reverse (3223661200243), we get a palindrome (6643682863466).

The spelling of 3420021663223 in words is "three trillion, four hundred twenty billion, twenty-one million, six hundred sixty-three thousand, two hundred twenty-three".