201101221101021 has 16 divisors (see below), whose sum is σ = 268715527153920. Its totient is φ = 133777200997440.

The previous prime is 201101221100939. The next prime is 201101221101031. The reversal of 201101221101021 is 120101122101102.

It is a happy number.

It is not a de Polignac number, because 201101221101021 - 2¹⁰ = 201101221099997 is a prime.

It is a super-2 number, since 2×201101221101021² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201101221101031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 432887215 + ... + 433351523.

It is an arithmetic number, because the mean of its divisors is an integer number (16794720447120).

Almost surely, 2^{201101221101021} is an apocalyptic number.

It is an amenable number.

201101221101021 is a deficient number, since it is larger than the sum of its proper divisors (67614306052899).

201101221101021 is a wasteful number, since it uses less digits than its factorization.

201101221101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776596.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 201101221101021 its reverse (120101122101102), we get a palindrome (321202343202123).

The spelling of 201101221101021 in words is "two hundred one trillion, one hundred one billion, two hundred twenty-one million, one hundred one thousand, twenty-one".