1211332231000 has 128 divisors (see below), whose sum is σ = 2903404046400. Its totient is φ = 472780492800.

The previous prime is 1211332230791. The next prime is 1211332231027. The reversal of 1211332231000 is 1322331121.

It is a super-2 number, since 2×1211332231000² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 43545096 + ... + 43572904.

Almost surely, 2^{1211332231000} is an apocalyptic number.

1211332231000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211332231000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1451702023200).

1211332231000 is an abundant number, since it is smaller than the sum of its proper divisors (1692071815400).

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

1211332231000 is a wasteful number, since it uses less digits than its factorization.

1211332231000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28886 (or 28872 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1211332231000 its reverse (1322331121), we get a palindrome (1212654562121).

The spelling of 1211332231000 in words is "one trillion, two hundred eleven billion, three hundred thirty-two million, two hundred thirty-one thousand".