213142240421 has 8 divisors (see below), whose sum is σ = 234576497664. Its totient is φ = 192050931520.

The previous prime is 213142240387. The next prime is 213142240463. The reversal of 213142240421 is 124042241312.

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

It is a cyclic number.

It is not a de Polignac number, because 213142240421 - 2⁶ = 213142240357 is a prime.

It is a super-2 number, since 2×213142240421² (a number of 23 digits) 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 (213142240621) 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, 85735781 + ... + 85738266.

It is an arithmetic number, because the mean of its divisors is an integer number (29322062208).

Almost surely, 2^213142240421 is an apocalyptic number.

It is an amenable number.

213142240421 is a deficient number, since it is larger than the sum of its proper divisors (21434257243).

213142240421 is a wasteful number, since it uses less digits than its factorization.

213142240421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171474171.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 213142240421 its reverse (124042241312), we get a palindrome (337184481733).

The spelling of 213142240421 in words is "two hundred thirteen billion, one hundred forty-two million, two hundred forty thousand, four hundred twenty-one".