2021111111201 has 64 divisors (see below), whose sum is σ = 2545584330240. Its totient is φ = 1562290329600.

The previous prime is 2021111111191. The next prime is 2021111111281. The reversal of 2021111111201 is 1021111111202.

It is a de Polignac number, because none of the positive numbers 2^k-2021111111201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2021111111281) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 447443195 + ... + 447447711.

It is an arithmetic number, because the mean of its divisors is an integer number (39774755160).

Almost surely, 2^{2021111111201} is an apocalyptic number.

It is an amenable number.

2021111111201 is a deficient number, since it is larger than the sum of its proper divisors (524473219039).

2021111111201 is a wasteful number, since it uses less digits than its factorization.

2021111111201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5274.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 2021111111201 its reverse (1021111111202), we get a palindrome (3042222222403).

Subtracting from 2021111111201 its reverse (1021111111202), we obtain a palindrome (999999999999).

It can be divided in two parts, 2021111 and 111201, that added together give a palindrome (2132312).

The spelling of 2021111111201 in words is "two trillion, twenty-one billion, one hundred eleven million, one hundred eleven thousand, two hundred one".