213420012243 has 32 divisors (see below), whose sum is σ = 302408328960. Its totient is φ = 133625681280.

The previous prime is 213420012193. The next prime is 213420012259. The reversal of 213420012243 is 342210024312.

It is a happy number.

It is not a de Polignac number, because 213420012243 - 2²⁴ = 213403235027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213420012293) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17798296 + ... + 17810282.

It is an arithmetic number, because the mean of its divisors is an integer number (9450260280).

Almost surely, 2^213420012243 is an apocalyptic number.

213420012243 is a deficient number, since it is larger than the sum of its proper divisors (88988316717).

213420012243 is a wasteful number, since it uses less digits than its factorization.

213420012243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17587.

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

Adding to 213420012243 its reverse (342210024312), we get a palindrome (555630036555).

The spelling of 213420012243 in words is "two hundred thirteen billion, four hundred twenty million, twelve thousand, two hundred forty-three".