212021233020 has 48 divisors (see below), whose sum is σ = 659621615520. Its totient is φ = 56538995328.

The previous prime is 212021233013. The next prime is 212021233033. The reversal of 212021233020 is 20332120212.

212021233020 is a `hidden beast` number, since 2 + 120 + 212 + 330 + 2 + 0 = 666.

It is a super-2 number, since 2×212021233020² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 212021232984 and 212021233002.

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, 196315417 + ... + 196316496.

It is an arithmetic number, because the mean of its divisors is an integer number (13742116990).

Almost surely, 2^212021233020 is an apocalyptic number.

212021233020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212021233020 is an abundant number, since it is smaller than the sum of its proper divisors (447600382500).

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

212021233020 is a wasteful number, since it uses less digits than its factorization.

212021233020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392631931 (or 392631923 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 212021233020 its reverse (20332120212), we get a palindrome (232353353232).

The spelling of 212021233020 in words is "two hundred twelve billion, twenty-one million, two hundred thirty-three thousand, twenty".