221210100342 has 96 divisors (see below), whose sum is σ = 598503919104. Its totient is φ = 57365884800.

The previous prime is 221210100323. The next prime is 221210100389. The reversal of 221210100342 is 243001012122.

It is a happy number.

221210100342 is a `hidden beast` number, since 2 + 212 + 10 + 100 + 342 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 748098 + ... + 1001034.

It is an arithmetic number, because the mean of its divisors is an integer number (6234415824).

Almost surely, 2^221210100342 is an apocalyptic number.

221210100342 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 221210100342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (299251959552).

221210100342 is an abundant number, since it is smaller than the sum of its proper divisors (377293818762).

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

221210100342 is a wasteful number, since it uses less digits than its factorization.

221210100342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253594 (or 253591 counting only the distinct ones).

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

Adding to 221210100342 its reverse (243001012122), we get a palindrome (464211112464).

The spelling of 221210100342 in words is "two hundred twenty-one billion, two hundred ten million, one hundred thousand, three hundred forty-two".