213123020430 has 64 divisors (see below), whose sum is σ = 529571856960. Its totient is φ = 54827544576.

The previous prime is 213123020423. The next prime is 213123020447. The reversal of 213123020430 is 34020321312.

It is a junction number, because it is equal to n+sod(n) for n = 213123020397 and 213123020406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 954334 + ... + 1156286.

It is an arithmetic number, because the mean of its divisors is an integer number (8274560265).

Almost surely, 2^213123020430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213123020430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264785928480).

213123020430 is an abundant number, since it is smaller than the sum of its proper divisors (316448836530).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213123020430 is a wasteful number, since it uses less digits than its factorization.

213123020430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203205.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 213123020430 its reverse (34020321312), we get a palindrome (247143341742).

The spelling of 213123020430 in words is "two hundred thirteen billion, one hundred twenty-three million, twenty thousand, four hundred thirty".