213233311220 has 24 divisors (see below), whose sum is σ = 448050217608. Its totient is φ = 85243750400.

The previous prime is 213233311217. The next prime is 213233311253. The reversal of 213233311220 is 22113332312.

It can be written as a sum of positive squares in 4 ways, for example, as 18965696656 + 194267614564 = 137716^2 + 440758^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3063101 + ... + 3131940.

It is an arithmetic number, because the mean of its divisors is an integer number (18668759067).

Almost surely, 2^213233311220 is an apocalyptic number.

213233311220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213233311220 is an abundant number, since it is smaller than the sum of its proper divisors (234816906388).

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

213233311220 is a wasteful number, since it uses less digits than its factorization.

213233311220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6196771 (or 6196769 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 213233311220 its reverse (22113332312), we get a palindrome (235346643532).

The spelling of 213233311220 in words is "two hundred thirteen billion, two hundred thirty-three million, three hundred eleven thousand, two hundred twenty".