213241331421 has 12 divisors (see below), whose sum is σ = 308027397600. Its totient is φ = 142155284040.

The previous prime is 213241331389. The next prime is 213241331423. The reversal of 213241331421 is 124133142312.

213241331421 is a `hidden beast` number, since 2 + 1 + 324 + 1 + 3 + 314 + 21 = 666.

It is not a de Polignac number, because 213241331421 - 2⁵ = 213241331389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213241331423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 219025 + ... + 688806.

It is an arithmetic number, because the mean of its divisors is an integer number (25668949800).

Almost surely, 2^213241331421 is an apocalyptic number.

It is an amenable number.

213241331421 is a deficient number, since it is larger than the sum of its proper divisors (94786066179).

213241331421 is a wasteful number, since it uses less digits than its factorization.

213241331421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 933936 (or 933933 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

Adding to 213241331421 its reverse (124133142312), we get a palindrome (337374473733).

The spelling of 213241331421 in words is "two hundred thirteen billion, two hundred forty-one million, three hundred thirty-one thousand, four hundred twenty-one".