10201221234 has 144 divisors (see below), whose sum is σ = 24337272960. Its totient is φ = 3080436480.

The previous prime is 10201221223. The next prime is 10201221241. The reversal of 10201221234 is 43212210201.

It is a happy number.

10201221234 is a `hidden beast` number, since 10 + 201 + 221 + 234 = 666.

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 (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 23237187 + ... + 23237625.

It is an arithmetic number, because the mean of its divisors is an integer number (169008840).

Almost surely, 2^10201221234 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10201221234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12168636480).

10201221234 is an abundant number, since it is smaller than the sum of its proper divisors (14136051726).

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

10201221234 is a wasteful number, since it uses less digits than its factorization.

10201221234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585 (or 545 counting only the distinct ones).

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

Adding to 10201221234 its reverse (43212210201), we get a palindrome (53413431435).

The spelling of 10201221234 in words is "ten billion, two hundred one million, two hundred twenty-one thousand, two hundred thirty-four".