213400430421 has 8 divisors (see below), whose sum is σ = 284697345504. Its totient is φ = 142185234480.

The previous prime is 213400430413. The next prime is 213400430431. The reversal of 213400430421 is 124034004312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 213400430421 - 2³ = 213400430413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213400430391 and 213400430400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213400430431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20423691 + ... + 20434136.

It is an arithmetic number, because the mean of its divisors is an integer number (35587168188).

Almost surely, 2^213400430421 is an apocalyptic number.

It is an amenable number.

213400430421 is a deficient number, since it is larger than the sum of its proper divisors (71296915083).

213400430421 is a wasteful number, since it uses less digits than its factorization.

213400430421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40859571.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 213400430421 its reverse (124034004312), we get a palindrome (337434434733).

The spelling of 213400430421 in words is "two hundred thirteen billion, four hundred million, four hundred thirty thousand, four hundred twenty-one".