201220011006 has 64 divisors (see below), whose sum is σ = 469592944128. Its totient is φ = 56296009728.

The previous prime is 201220010987. The next prime is 201220011019. The reversal of 201220011006 is 600110022102.

It is a super-2 number, since 2×201220011006² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 138510 + ... + 649326.

It is an arithmetic number, because the mean of its divisors is an integer number (7337389752).

Almost surely, 2^201220011006 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201220011006, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234796472064).

201220011006 is an abundant number, since it is smaller than the sum of its proper divisors (268372933122).

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

201220011006 is a wasteful number, since it uses less digits than its factorization.

201220011006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511025.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 201220011006 its reverse (600110022102), we get a palindrome (801330033108).

The spelling of 201220011006 in words is "two hundred one billion, two hundred twenty million, eleven thousand, six".