210101221242 has 96 divisors (see below), whose sum is σ = 514634852160. Its totient is φ = 61363008000.

The previous prime is 210101221207. The next prime is 210101221243. The reversal of 210101221242 is 242122101012.

210101221242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (210101221243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3246642 + ... + 3310722.

It is an arithmetic number, because the mean of its divisors is an integer number (5360779710).

Almost surely, 2^210101221242 is an apocalyptic number.

210101221242 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 210101221242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (257317426080).

210101221242 is an abundant number, since it is smaller than the sum of its proper divisors (304533630918).

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

210101221242 is a wasteful number, since it uses less digits than its factorization.

210101221242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64700 (or 64697 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 210101221242 its reverse (242122101012), we get a palindrome (452223322254).

The spelling of 210101221242 in words is "two hundred ten billion, one hundred one million, two hundred twenty-one thousand, two hundred forty-two".