212134203220 has 24 divisors (see below), whose sum is σ = 445542589800. Its totient is φ = 84842107392.

The previous prime is 212134203199. The next prime is 212134203247. The reversal of 212134203220 is 22302431212.

It can be written as a sum of positive squares in 4 ways, for example, as 53473787536 + 158660415684 = 231244^2 + 398322^2 .

It is a junction number, because it is equal to n+sod(n) for n = 212134203191 and 212134203200.

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, 572305 + ... + 867064.

It is an arithmetic number, because the mean of its divisors is an integer number (18564274575).

Almost surely, 2^212134203220 is an apocalyptic number.

212134203220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212134203220 is an abundant number, since it is smaller than the sum of its proper divisors (233408386580).

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

212134203220 is a wasteful number, since it uses less digits than its factorization.

212134203220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1446747 (or 1446745 counting only the distinct ones).

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

Adding to 212134203220 its reverse (22302431212), we get a palindrome (234436634432).

The spelling of 212134203220 in words is "two hundred twelve billion, one hundred thirty-four million, two hundred three thousand, two hundred twenty".