221232400110 has 24 divisors (see below), whose sum is σ = 575204240520. Its totient is φ = 58995306672.

The previous prime is 221232400099. The next prime is 221232400111. The reversal of 221232400110 is 11004232122.

It is a happy number.

221232400110 is a `hidden beast` number, since 2 + 21 + 232 + 400 + 1 + 10 = 666.

It is a super-2 number, since 2×221232400110² (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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221232400111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1229068800 + ... + 1229068979.

It is an arithmetic number, because the mean of its divisors is an integer number (23966843355).

Almost surely, 2^221232400110 is an apocalyptic number.

221232400110 is an abundant number, since it is smaller than the sum of its proper divisors (353971840410).

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

221232400110 is a wasteful number, since it uses less digits than its factorization.

221232400110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2458137792 (or 2458137789 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 221232400110 its reverse (11004232122), we get a palindrome (232236632232).

The spelling of 221232400110 in words is "two hundred twenty-one billion, two hundred thirty-two million, four hundred thousand, one hundred ten".