211231003120 has 40 divisors (see below), whose sum is σ = 491597080416. Its totient is φ = 84408960768.

The previous prime is 211231003117. The next prime is 211231003127. The reversal of 211231003120 is 21300132112.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 211231003094 and 211231003103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211231003127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1222212 + ... + 1384291.

Almost surely, 2^211231003120 is an apocalyptic number.

211231003120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211231003120 is an abundant number, since it is smaller than the sum of its proper divisors (280366077296).

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

211231003120 is a wasteful number, since it uses less digits than its factorization.

211231003120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2607529 (or 2607523 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 211231003120 its reverse (21300132112), we get a palindrome (232531135232).

The spelling of 211231003120 in words is "two hundred eleven billion, two hundred thirty-one million, three thousand, one hundred twenty".