211231100203320 has 64 divisors (see below), whose sum is σ = 633702314420640. Its totient is φ = 56327492160000.

The previous prime is 211231100203307. The next prime is 211231100203327. The reversal of 211231100203320 is 23302001132112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211231100203327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4023811 + ... + 20944050.

Almost surely, 2^{211231100203320} is an apocalyptic number.

211231100203320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211231100203320 is an abundant number, since it is smaller than the sum of its proper divisors (422471214217320).

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

211231100203320 is a wasteful number, since it uses less digits than its factorization.

211231100203320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25038376 (or 25038372 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 211231100203320 its reverse (23302001132112), we get a palindrome (234533101335432).

The spelling of 211231100203320 in words is "two hundred eleven trillion, two hundred thirty-one billion, one hundred million, two hundred three thousand, three hundred twenty".