211420020420 has 144 divisors (see below), whose sum is σ = 737419912320. Its totient is φ = 48028059648.

The previous prime is 211420020419. The next prime is 211420020451. The reversal of 211420020420 is 24020024112.

211420020420 is a `hidden beast` number, since 21 + 1 + 4 + 200 + 20 + 420 = 666.

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 = 211420020393 and 211420020402.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 309325 + ... + 720084.

Almost surely, 2^211420020420 is an apocalyptic number.

211420020420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211420020420 is an abundant number, since it is smaller than the sum of its proper divisors (525999891900).

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

211420020420 is a wasteful number, since it uses less digits than its factorization.

211420020420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1029594 (or 1029589 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 211420020420 its reverse (24020024112), we get a palindrome (235440044532).

The spelling of 211420020420 in words is "two hundred eleven billion, four hundred twenty million, twenty thousand, four hundred twenty".