2021200001191 has 4 divisors (see below), whose sum is σ = 2309942858512. Its totient is φ = 1732457143872.

The previous prime is 2021200001167. The next prime is 2021200001231. The reversal of 2021200001191 is 1911000021202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2021200001191 - 2²⁹ = 2020663130279 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 (2021200001101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144371428650 + ... + 144371428663.

It is an arithmetic number, because the mean of its divisors is an integer number (577485714628).

Almost surely, 2^{2021200001191} is an apocalyptic number.

2021200001191 is a deficient number, since it is larger than the sum of its proper divisors (288742857321).

2021200001191 is an equidigital number, since it uses as much as digits as its factorization.

2021200001191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288742857320.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 2021200001191 its reverse (1911000021202), we get a palindrome (3932200022393).

The spelling of 2021200001191 in words is "two trillion, twenty-one billion, two hundred million, one thousand, one hundred ninety-one".