4021213433 has 4 divisors (see below), whose sum is σ = 4021345680. Its totient is φ = 4021081188.

The previous prime is 4021213429. The next prime is 4021213501. The reversal of 4021213433 is 3343121204.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 4021213433 - 2² = 4021213429 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4021213399 and 4021213408.

It is not an unprimeable number, because it can be changed into a prime (4021213033) 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, 4958 + ... + 89816.

It is an arithmetic number, because the mean of its divisors is an integer number (1005336420).

Almost surely, 2^4021213433 is an apocalyptic number.

It is an amenable number.

4021213433 is a deficient number, since it is larger than the sum of its proper divisors (132247).

4021213433 is an equidigital number, since it uses as much as digits as its factorization.

4021213433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132246.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 4021213433 is about 63413.0383517459. The cubic root of 4021213433 is about 1590.2022912853.

Adding to 4021213433 its reverse (3343121204), we get a palindrome (7364334637).

The spelling of 4021213433 in words is "four billion, twenty-one million, two hundred thirteen thousand, four hundred thirty-three".