4269212821 has 4 divisors (see below), whose sum is σ = 4270104652. Its totient is φ = 4268320992.

The previous prime is 4269212803. The next prime is 4269212881. The reversal of 4269212821 is 1282129624.

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 3298204900 + 971007921 = 57430^2 + 31161^2 .

It is a cyclic number.

It is not a de Polignac number, because 4269212821 - 2¹¹ = 4269210773 is a prime.

It is a super-2 number, since 2×4269212821² = 36452356221981556082, which 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 (4269212881) 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, 438696 + ... + 448321.

It is an arithmetic number, because the mean of its divisors is an integer number (1067526163).

Almost surely, 2^4269212821 is an apocalyptic number.

It is an amenable number.

4269212821 is a deficient number, since it is larger than the sum of its proper divisors (891831).

4269212821 is an equidigital number, since it uses as much as digits as its factorization.

4269212821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891830.

The product of its digits is 27648, while the sum is 37.

The square root of 4269212821 is about 65339.2135015413. The cubic root of 4269212821 is about 1622.2430976840.

The spelling of 4269212821 in words is "four billion, two hundred sixty-nine million, two hundred twelve thousand, eight hundred twenty-one".