201021211100101 has 32 divisors (see below), whose sum is σ = 236112307200000. Its totient is φ = 167572193513472.

The previous prime is 201021211100023. The next prime is 201021211100119. The reversal of 201021211100101 is 101001112120102.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 201021211100101 - 2¹⁵ = 201021211067333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201021211100131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48350850 + ... + 52343548.

It is an arithmetic number, because the mean of its divisors is an integer number (7378509600000).

Almost surely, 2^{201021211100101} is an apocalyptic number.

It is an amenable number.

201021211100101 is a deficient number, since it is larger than the sum of its proper divisors (35091096099899).

201021211100101 is a wasteful number, since it uses less digits than its factorization.

201021211100101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3993721.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 201021211100101 its reverse (101001112120102), we get a palindrome (302022323220203).

The spelling of 201021211100101 in words is "two hundred one trillion, twenty-one billion, two hundred eleven million, one hundred thousand, one hundred one".