2021000220191 has 8 divisors (see below), whose sum is σ = 2038708193280. Its totient is φ = 2003356993752.

The previous prime is 2021000220157. The next prime is 2021000220209. The reversal of 2021000220191 is 1910220001202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-2021000220191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021000220091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16123961 + ... + 16248818.

It is an arithmetic number, because the mean of its divisors is an integer number (254838524160).

Almost surely, 2^{2021000220191} is an apocalyptic number.

2021000220191 is a deficient number, since it is larger than the sum of its proper divisors (17707973089).

2021000220191 is a wasteful number, since it uses less digits than its factorization.

2021000220191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32373325.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 2021000220191 its reverse (1910220001202), we get a palindrome (3931220221393).

The spelling of 2021000220191 in words is "two trillion, twenty-one billion, two hundred twenty thousand, one hundred ninety-one".