212424111020 has 48 divisors (see below), whose sum is σ = 491462639136. Its totient is φ = 76480320000.

The previous prime is 212424111007. The next prime is 212424111023. The reversal of 212424111020 is 20111424212.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 212424110983 and 212424111001.

It is not an unprimeable number, because it can be changed into a prime (212424111023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4757801 + ... + 4802240.

It is an arithmetic number, because the mean of its divisors is an integer number (10238804982).

Almost surely, 2^212424111020 is an apocalyptic number.

212424111020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212424111020 is an abundant number, since it is smaller than the sum of its proper divisors (279038528116).

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

212424111020 is a wasteful number, since it uses less digits than its factorization.

212424111020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9560162 (or 9560160 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 212424111020 its reverse (20111424212), we get a palindrome (232535535232).

The spelling of 212424111020 in words is "two hundred twelve billion, four hundred twenty-four million, one hundred eleven thousand, twenty".