212011004820 has 96 divisors (see below), whose sum is σ = 607388035968. Its totient is φ = 55240538112.

The previous prime is 212011004819. The next prime is 212011004831. The reversal of 212011004820 is 28400110212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 242472 + ... + 694848.

It is an arithmetic number, because the mean of its divisors is an integer number (6326958708).

Almost surely, 2^212011004820 is an apocalyptic number.

212011004820 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 212011004820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (303694017984).

212011004820 is an abundant number, since it is smaller than the sum of its proper divisors (395377031148).

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

212011004820 is a wasteful number, since it uses less digits than its factorization.

212011004820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452569 (or 452567 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The spelling of 212011004820 in words is "two hundred twelve billion, eleven million, four thousand, eight hundred twenty".