201201011100021 has 16 divisors (see below), whose sum is σ = 280733938531200. Its totient is φ = 127934466242880.

The previous prime is 201201011099983. The next prime is 201201011100053. The reversal of 201201011100021 is 120001110102102.

It is not a de Polignac number, because 201201011100021 - 2²³ = 201201002711413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201201011108021) 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, 4177564290 + ... + 4177612451.

It is an arithmetic number, because the mean of its divisors is an integer number (17545871158200).

Almost surely, 2^{201201011100021} is an apocalyptic number.

It is an amenable number.

201201011100021 is a deficient number, since it is larger than the sum of its proper divisors (79532927431179).

201201011100021 is a wasteful number, since it uses less digits than its factorization.

201201011100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8355177116.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 201201011100021 its reverse (120001110102102), we get a palindrome (321202121202123).

The spelling of 201201011100021 in words is "two hundred one trillion, two hundred one billion, eleven million, one hundred thousand, twenty-one".