211111231000 has 32 divisors (see below), whose sum is σ = 494000282880. Its totient is φ = 84444492000.

The previous prime is 211111230997. The next prime is 211111231003. The reversal of 211111231000 is 132111112.

It is a happy number.

211111231000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (211111230997) and next prime (211111231003).

It is a super-2 number, since 2×211111231000² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211111231003) 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 7 ways as a sum of consecutive naturals, for example, 105554616 + ... + 105556615.

It is an arithmetic number, because the mean of its divisors is an integer number (15437508840).

Almost surely, 2^211111231000 is an apocalyptic number.

211111231000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211111231000 is an abundant number, since it is smaller than the sum of its proper divisors (282889051880).

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

211111231000 is a wasteful number, since it uses less digits than its factorization.

211111231000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211111252 (or 211111238 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 211111231000 its reverse (132111112), we get a palindrome (211243342112).

The spelling of 211111231000 in words is "two hundred eleven billion, one hundred eleven million, two hundred thirty-one thousand".