212020224421 has 16 divisors (see below), whose sum is σ = 222573754368. Its totient is φ = 201579664000.

The previous prime is 212020224397. The next prime is 212020224463. The reversal of 212020224421 is 124422020212.

It is a cyclic number.

It is not a de Polignac number, because 212020224421 - 2¹¹ = 212020222373 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212020224392 and 212020224401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212020224121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5696745 + ... + 5733841.

It is an arithmetic number, because the mean of its divisors is an integer number (13910859648).

Almost surely, 2^212020224421 is an apocalyptic number.

It is an amenable number.

212020224421 is a deficient number, since it is larger than the sum of its proper divisors (10553529947).

212020224421 is a wasteful number, since it uses less digits than its factorization.

212020224421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38612.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 212020224421 its reverse (124422020212), we get a palindrome (336442244633).

The spelling of 212020224421 in words is "two hundred twelve billion, twenty million, two hundred twenty-four thousand, four hundred twenty-one".