212103023220 has 144 divisors (see below), whose sum is σ = 703621114560. Its totient is φ = 51290496000.

The previous prime is 212103023203. The next prime is 212103023239. The reversal of 212103023220 is 22320301212.

212103023220 is a `hidden beast` number, since 21 + 21 + 0 + 302 + 322 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 212103023193 and 212103023202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 660411 + ... + 927549.

It is an arithmetic number, because the mean of its divisors is an integer number (4886257740).

Almost surely, 2^212103023220 is an apocalyptic number.

212103023220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212103023220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (351810557280).

212103023220 is an abundant number, since it is smaller than the sum of its proper divisors (491518091340).

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

212103023220 is a wasteful number, since it uses less digits than its factorization.

212103023220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267566 (or 267561 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 212103023220 its reverse (22320301212), we get a palindrome (234423324432).

The spelling of 212103023220 in words is "two hundred twelve billion, one hundred three million, twenty-three thousand, two hundred twenty".