4020100321 has 4 divisors (see below), whose sum is σ = 4158724500. Its totient is φ = 3881476144.

The previous prime is 4020100277. The next prime is 4020100327. The reversal of 4020100321 is 1230010204.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2395123600 + 1624976721 = 48940^2 + 40311^2 .

It is a cyclic number.

It is not a de Polignac number, because 4020100321 - 2⁷ = 4020100193 is a prime.

It is a super-2 number, since 2×4020100321² = 32322413181808606082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4020100327) 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, 69312046 + ... + 69312103.

It is an arithmetic number, because the mean of its divisors is an integer number (1039681125).

Almost surely, 2^4020100321 is an apocalyptic number.

It is an amenable number.

4020100321 is a deficient number, since it is larger than the sum of its proper divisors (138624179).

4020100321 is a wasteful number, since it uses less digits than its factorization.

4020100321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138624178.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 4020100321 is about 63404.2610634333. The cubic root of 4020100321 is about 1590.0555497911.

Adding to 4020100321 its reverse (1230010204), we get a palindrome (5250110525).

The spelling of 4020100321 in words is "four billion, twenty million, one hundred thousand, three hundred twenty-one".