201020021211111 has 16 divisors (see below), whose sum is σ = 268246633084800. Its totient is φ = 133903381046688.

The previous prime is 201020021211101. The next prime is 201020021211157. The reversal of 201020021211111 is 111112120020102.

It is a happy number.

It is not a de Polignac number, because 201020021211111 - 2²⁷ = 201019886993383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201020021211101) 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, 356935780 + ... + 357498518.

It is an arithmetic number, because the mean of its divisors is an integer number (16765414567800).

Almost surely, 2^{201020021211111} is an apocalyptic number.

201020021211111 is a deficient number, since it is larger than the sum of its proper divisors (67226611873689).

201020021211111 is a wasteful number, since it uses less digits than its factorization.

201020021211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660238.

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

Adding to 201020021211111 its reverse (111112120020102), we get a palindrome (312132141231213).

The spelling of 201020021211111 in words is "two hundred one trillion, twenty billion, twenty-one million, two hundred eleven thousand, one hundred eleven".