212021001020 has 12 divisors (see below), whose sum is σ = 445244102184. Its totient is φ = 84808400400.

The previous prime is 212021001011. The next prime is 212021001041. The reversal of 212021001020 is 20100120212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 212021000992 and 212021001010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5300525006 + ... + 5300525045.

It is an arithmetic number, because the mean of its divisors is an integer number (37103675182).

Almost surely, 2^212021001020 is an apocalyptic number.

212021001020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212021001020 is an abundant number, since it is smaller than the sum of its proper divisors (233223101164).

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

212021001020 is a wasteful number, since it uses less digits than its factorization.

212021001020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10601050060 (or 10601050058 counting only the distinct ones).

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

Adding to 212021001020 its reverse (20100120212), we get a palindrome (232121121232).

The spelling of 212021001020 in words is "two hundred twelve billion, twenty-one million, one thousand, twenty".