212012100020 has 48 divisors (see below), whose sum is σ = 535609522560. Its totient is φ = 68864079744.

The previous prime is 212012100019. The next prime is 212012100037. The reversal of 212012100020 is 20001210212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 212012099974 and 212012100010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39849239 + ... + 39854558.

It is an arithmetic number, because the mean of its divisors is an integer number (11158531720).

Almost surely, 2^212012100020 is an apocalyptic number.

212012100020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212012100020 is an abundant number, since it is smaller than the sum of its proper divisors (323597422540).

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

212012100020 is a wasteful number, since it uses less digits than its factorization.

212012100020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79703832 (or 79703830 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 212012100020 its reverse (20001210212), we get a palindrome (232013310232).

The spelling of 212012100020 in words is "two hundred twelve billion, twelve million, one hundred thousand, twenty".