212021031020 has 48 divisors (see below), whose sum is σ = 447572381760. Its totient is φ = 84366054144.

The previous prime is 212021031017. The next prime is 212021031037. The reversal of 212021031020 is 20130120212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 212021030986 and 212021031004.

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 15 ways as a sum of consecutive naturals, for example, 3053246 + ... + 3121914.

It is an arithmetic number, because the mean of its divisors is an integer number (9324424620).

Almost surely, 2^212021031020 is an apocalyptic number.

212021031020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212021031020 is an abundant number, since it is smaller than the sum of its proper divisors (235551350740).

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

212021031020 is a wasteful number, since it uses less digits than its factorization.

212021031020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69482 (or 69480 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 212021031020 its reverse (20130120212), we get a palindrome (232151151232).

The spelling of 212021031020 in words is "two hundred twelve billion, twenty-one million, thirty-one thousand, twenty".