211204204420 has 48 divisors (see below), whose sum is σ = 484163987328. Its totient is φ = 76751631360.

The previous prime is 211204204411. The next prime is 211204204423. The reversal of 211204204420 is 24402402112.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 211204204391 and 211204204400.

It is not an unprimeable number, because it can be changed into a prime (211204204423) 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, 28372 + ... + 650548.

It is an arithmetic number, because the mean of its divisors is an integer number (10086749736).

Almost surely, 2^211204204420 is an apocalyptic number.

211204204420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211204204420 is an abundant number, since it is smaller than the sum of its proper divisors (272959782908).

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

211204204420 is a wasteful number, since it uses less digits than its factorization.

211204204420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623740 (or 623738 counting only the distinct ones).

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

Adding to 211204204420 its reverse (24402402112), we get a palindrome (235606606532).

The spelling of 211204204420 in words is "two hundred eleven billion, two hundred four million, two hundred four thousand, four hundred twenty".