221122031130 has 384 divisors, whose sum is σ = 784590782976. Its totient is φ = 41716684800.

The previous prime is 221122031129. The next prime is 221122031147. The reversal of 221122031130 is 31130221122.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 5475372 + ... + 5515608.

It is an arithmetic number, because the mean of its divisors is an integer number (2043205164).

Almost surely, 2^221122031130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221122031130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (392295391488).

221122031130 is an abundant number, since it is smaller than the sum of its proper divisors (563468751846).

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

221122031130 is a wasteful number, since it uses less digits than its factorization.

221122031130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40342 (or 40339 counting only the distinct ones).

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

Adding to 221122031130 its reverse (31130221122), we get a palindrome (252252252252).

The spelling of 221122031130 in words is "two hundred twenty-one billion, one hundred twenty-two million, thirty-one thousand, one hundred thirty".