212133135520 has 48 divisors (see below), whose sum is σ = 501310810728. Its totient is φ = 84828487680.

The previous prime is 212133135463. The next prime is 212133135569. The reversal of 212133135520 is 25531331212.

It can be written as a sum of positive squares in 4 ways, for example, as 49959402256 + 162173733264 = 223516^2 + 402708^2 .

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, 361360 + ... + 744880.

Almost surely, 2^212133135520 is an apocalyptic number.

212133135520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212133135520 is an abundant number, since it is smaller than the sum of its proper divisors (289177675208).

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

212133135520 is a wasteful number, since it uses less digits than its factorization.

212133135520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386993 (or 386985 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

Adding to 212133135520 its reverse (25531331212), we get a palindrome (237664466732).

The spelling of 212133135520 in words is "two hundred twelve billion, one hundred thirty-three million, one hundred thirty-five thousand, five hundred twenty".