101021211606 has 128 divisors (see below), whose sum is σ = 246738124800. Its totient is φ = 26931864960.

The previous prime is 101021211601. The next prime is 101021211623. The reversal of 101021211606 is 606112120101.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101021211601) 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, 29186716 + ... + 29190176.

It is an arithmetic number, because the mean of its divisors is an integer number (1927641600).

Almost surely, 2^101021211606 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 101021211606, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123369062400).

101021211606 is an abundant number, since it is smaller than the sum of its proper divisors (145716913194).

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

101021211606 is a wasteful number, since it uses less digits than its factorization.

101021211606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4034.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 101021211606 its reverse (606112120101), we get a palindrome (707133331707).

The spelling of 101021211606 in words is "one hundred one billion, twenty-one million, two hundred eleven thousand, six hundred six".