231103012221000 has 256 divisors, whose sum is σ = 801174846700800. Its totient is φ = 61626105504000.

The previous prime is 231103012220957. The next prime is 231103012221017. The reversal of 231103012221000 is 122210301132.

231103012221000 is a `hidden beast` number, since 2 + 31 + 10 + 301 + 222 + 100 + 0 = 666.

231103012221000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2005853395 + ... + 2005968605.

It is an arithmetic number, because the mean of its divisors is an integer number (3129589244925).

Almost surely, 2^{231103012221000} is an apocalyptic number.

231103012221000 is a gapful number since it is divisible by the number (20) 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 231103012221000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (400587423350400).

231103012221000 is an abundant number, since it is smaller than the sum of its proper divisors (570071834479800).

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

231103012221000 is a wasteful number, since it uses less digits than its factorization.

231103012221000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189534 (or 189514 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 231103012221000 its reverse (122210301132), we get a palindrome (231225222522132).

The spelling of 231103012221000 in words is "two hundred thirty-one trillion, one hundred three billion, twelve million, two hundred twenty-one thousand".