213232421020 has 48 divisors (see below), whose sum is σ = 449741859840. Its totient is φ = 84921232896.

The previous prime is 213232420993. The next prime is 213232421033. The reversal of 213232421020 is 20124232312.

It is a junction number, because it is equal to n+sod(n) for n = 213232420982 and 213232421000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8935024 + ... + 8958856.

It is an arithmetic number, because the mean of its divisors is an integer number (9369622080).

Almost surely, 2^213232421020 is an apocalyptic number.

213232421020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213232421020 is an abundant number, since it is smaller than the sum of its proper divisors (236509438820).

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

213232421020 is a wasteful number, since it uses less digits than its factorization.

213232421020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25774 (or 25772 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 213232421020 its reverse (20124232312), we get a palindrome (233356653332).

The spelling of 213232421020 in words is "two hundred thirteen billion, two hundred thirty-two million, four hundred twenty-one thousand, twenty".