213432012421 has 4 divisors (see below), whose sum is σ = 213507727200. Its totient is φ = 213356297644.

The previous prime is 213432012401. The next prime is 213432012461. The reversal of 213432012421 is 124210234312.

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.

It is a cyclic number.

It is not a de Polignac number, because 213432012421 - 2¹¹ = 213432010373 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 (213432012401) 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, 37853161 + ... + 37858798.

It is an arithmetic number, because the mean of its divisors is an integer number (53376931800).

Almost surely, 2^213432012421 is an apocalyptic number.

It is an amenable number.

213432012421 is a deficient number, since it is larger than the sum of its proper divisors (75714779).

213432012421 is an equidigital number, since it uses as much as digits as its factorization.

213432012421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75714778.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 213432012421 its reverse (124210234312), we get a palindrome (337642246733).

The spelling of 213432012421 in words is "two hundred thirteen billion, four hundred thirty-two million, twelve thousand, four hundred twenty-one".