4023100020421 has 4 divisors (see below), whose sum is σ = 4023105590700. Its totient is φ = 4023094450144.

The previous prime is 4023100020353. The next prime is 4023100020427. The reversal of 4023100020421 is 1240200013204.

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 443171135521 + 3579928884900 = 665711^2 + 1892070^2 .

It is a cyclic number.

It is not a de Polignac number, because 4023100020421 - 2³⁹ = 3473344206533 is a prime.

It is a super-2 number, since 2×4023100020421² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4023100020427) 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, 1505926 + ... + 3211543.

It is an arithmetic number, because the mean of its divisors is an integer number (1005776397675).

Almost surely, 2^{4023100020421} is an apocalyptic number.

It is an amenable number.

4023100020421 is a deficient number, since it is larger than the sum of its proper divisors (5570279).

4023100020421 is an equidigital number, since it uses as much as digits as its factorization.

4023100020421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5570278.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 4023100020421 its reverse (1240200013204), we get a palindrome (5263300033625).

The spelling of 4023100020421 in words is "four trillion, twenty-three billion, one hundred million, twenty thousand, four hundred twenty-one".