221123120130 has 128 divisors (see below), whose sum is σ = 643487120640. Its totient is φ = 53587284480.

The previous prime is 221123120129. The next prime is 221123120131. The reversal of 221123120130 is 31021321122.

221123120130 is a `hidden beast` number, since 221 + 1 + 2 + 312 + 0 + 130 = 666.

It is an interprime number because it is at equal distance from previous prime (221123120129) and next prime (221123120131).

It is a super-2 number, since 2×221123120130² (a number of 23 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (221123120131) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10006774 + ... + 10028846.

It is an arithmetic number, because the mean of its divisors is an integer number (5027243130).

Almost surely, 2^221123120130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221123120130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (321743560320).

221123120130 is an abundant number, since it is smaller than the sum of its proper divisors (422364000510).

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

221123120130 is a wasteful number, since it uses less digits than its factorization.

221123120130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25473 (or 25467 counting only the distinct ones).

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

Adding to 221123120130 its reverse (31021321122), we get a palindrome (252144441252).

The spelling of 221123120130 in words is "two hundred twenty-one billion, one hundred twenty-three million, one hundred twenty thousand, one hundred thirty".